Merge branch 'development' into fix/instant/signature-denied

* development: (914 commits)
  Unfix compiler version except for top level contracts
  Move OrderValidator to extensions
  Update CHANGELOG
  Remove assembly version of matchOrders
  Add getOrderInfo check before calling fillOrder
  Update comments and hard code function selector constants
  Fix build after rebase
  update comments
  Fix build and add back tests
  Update dependency paths
  Add OrderMatcher tests
  feat: Add OrderMatcher contract that takes spread in multiple assets by calling `matchOrders` followed by `fillOrder`
  Update CHANGELOG
  Use more efficient equality checks
  Add note about input validation
  Use more efficient check for overflow
  Check if amount == 0 before doing division
  Reapply prettier
  New relayers
  feat(sra_client.py): Test deployed pkg via tox
  ...

2 files changed, 228 insertions, 0 deletions

diff --git a/packages/website/ts/@next/components/dropdowns/dropdown_developers.tsx b/packages/website/ts/@next/components/dropdowns/dropdown_developers.tsx
new file mode 100644
index 000000000..96d88846b
--- /dev/null
+++ b/packages/website/ts/@next/components/dropdowns/dropdown_developers.tsx
@@ -0,0 +1,180 @@
+import { Link } from '@0x/react-shared';
+import * as _ from 'lodash';
+import * as React from 'react';
+import styled, { withTheme } from 'styled-components';
+
+import { Button } from 'ts/@next/components/button';
+import { Column, FlexWrap, WrapGrid } from 'ts/@next/components/newLayout';
+import { ThemeValuesInterface } from 'ts/@next/components/siteWrap';
+import { Heading } from 'ts/@next/components/text';
+import { WebsitePaths } from 'ts/types';
+import { constants } from 'ts/utils/constants';
+
+interface Props {
+    theme: ThemeValuesInterface;
+}
+
+interface LinkConfig {
+    label: string;
+    url: string;
+    shouldOpenInNewTab?: boolean;
+}
+
+const introData: LinkConfig[] = [
+    {
+        label: 'Build a relayer',
+        url: `${WebsitePaths.Wiki}#Build-A-Relayer`,
+    },
+    {
+        label: 'Develop on Ethereum',
+        url: `${WebsitePaths.Wiki}#Ethereum-Development`,
+    },
+    {
+        label: 'Make & take orders',
+        url: `${WebsitePaths.Wiki}#Create,-Validate,-Fill-Order`,
+    },
+    {
+        label: 'Use networked liquidity',
+        url: `${WebsitePaths.Wiki}#Find,-Submit,-Fill-Order-From-Relayer`,
+    },
+];
+
+const docsData: LinkConfig[] = [
+    {
+        label: '0x.js',
+        url: WebsitePaths.ZeroExJs,
+    },
+    {
+        label: '0x Connect',
+        url: WebsitePaths.Connect,
+    },
+    {
+        label: 'Smart Contract',
+        url: WebsitePaths.SmartContracts,
+    },
+];
+
+const linksData: LinkConfig[] = [
+    {
+        label: 'Wiki',
+        url: WebsitePaths.Wiki,
+    },
+    {
+        label: 'Github',
+        url: constants.URL_GITHUB_ORG,
+        shouldOpenInNewTab: true,
+    },
+    {
+        label: 'Protocol specification',
+        url: constants.URL_PROTOCOL_SPECIFICATION,
+        shouldOpenInNewTab: true,
+    },
+];
+
+export const DropdownDevelopers: React.FunctionComponent<Props> = withTheme((props: Props) => (
+    <>
+        <DropdownWrap>
+            <div>
+                <Heading asElement="h4" size={14} color="inherit" marginBottom="15px" isMuted={0.35}>
+                    Getting Started
+                </Heading>
+
+                <StyledGrid isCentered={false} isWrapped={true}>
+                    {_.map(introData, (item, index) => (
+                        <li>
+                            <Link key={`introLink-${index}`} to={item.url}>
+                                {item.label}
+                            </Link>
+                        </li>
+                    ))}
+                </StyledGrid>
+            </div>
+
+            <StyledWrap>
+                <Column width="calc(100% - 15px)">
+                    <Heading asElement="h4" size={14} color="inherit" marginBottom="15px" isMuted={0.35}>
+                        Popular Docs
+                    </Heading>
+
+                    <ul>
+                        {_.map(docsData, (item, index) => (
+                            <li key={`docsLink-${index}`}>
+                                <Link to={item.url} shouldOpenInNewTab={item.shouldOpenInNewTab}>
+                                    {item.label}
+                                </Link>
+                            </li>
+                        ))}
+                    </ul>
+                </Column>
+
+                <Column width="calc(100% - 15px)">
+                    <Heading asElement="h4" size={14} color="inherit" marginBottom="15px" isMuted={0.35}>
+                        Useful Links
+                    </Heading>
+
+                    <ul>
+                        {_.map(linksData, (item, index) => (
+                            <li key={`usefulLink-${index}`}>
+                                <Link to={item.url} shouldOpenInNewTab={item.shouldOpenInNewTab}>
+                                    {item.label}
+                                </Link>
+                            </li>
+                        ))}
+                    </ul>
+                </Column>
+            </StyledWrap>
+
+            <StyledLink
+                to={WebsitePaths.Docs}
+                bgColor={props.theme.dropdownButtonBg}
+                isAccentColor={true}
+                isNoBorder={true}
+            >
+                View All Documentation
+            </StyledLink>
+        </DropdownWrap>
+    </>
+));
+
+const DropdownWrap = styled.div`
+    padding: 15px 30px 75px 30px;
+
+    a {
+        color: inherit;
+    }
+
+    li {
+        margin: 8px 0;
+    }
+`;
+
+const StyledGrid = styled(WrapGrid.withComponent('ul'))`
+    li {
+        width: 50%;
+        flex-shrink: 0;
+    }
+`;
+
+const StyledWrap = styled(FlexWrap)`
+    padding-top: 20px;
+    margin-top: 30px;
+    position: relative;
+
+    &:before {
+        content: '';
+        width: 100%;
+        height: 1px;
+        background-color: ${props => props.theme.dropdownColor};
+        opacity: 0.15;
+        position: absolute;
+        top: 0;
+        left: 0;
+    }
+`;
+
+const StyledLink = styled(Button)`
+    width: 100%;
+    position: absolute;
+    bottom: 0;
+    left: 0;
+`;
diff --git a/packages/website/ts/@next/components/dropdowns/dropdown_products.tsx b/packages/website/ts/@next/components/dropdowns/dropdown_products.tsx
new file mode 100644
index 000000000..886cee44a
--- /dev/null
+++ b/packages/website/ts/@next/components/dropdowns/dropdown_products.tsx
@@ -0,0 +1,48 @@
+import * as _ from 'lodash';
+import * as React from 'react';
+
+import { Link } from 'react-router-dom';
+import styled from 'styled-components';
+import { Heading, Paragraph } from 'ts/@next/components/text';
+import { WebsitePaths } from 'ts/types';
+
+const navData = [
+    {
+        title: '0x Instant',
+        description: 'Simple crypto purchasing',
+        url: WebsitePaths.Instant,
+    },
+    {
+        title: '0x Launch Kit',
+        description: 'Build on the 0x protocol',
+        url: WebsitePaths.LaunchKit,
+    },
+];
+
+export const DropdownProducts: React.FunctionComponent<{}> = () => (
+    <List>
+        {_.map(navData, (item, index) => (
+            <li key={`productLink-${index}`}>
+                <Link to={item.url}>
+                    <Heading asElement="h3" color="inherit" isNoMargin={true} size="small">
+                        {item.title}
+                    </Heading>
+
+                    {item.description && (
+                        <Paragraph color="inherit" isNoMargin={true} size="small" isMuted={0.5}>
+                            {item.description}
+                        </Paragraph>
+                    )}
+                </Link>
+            </li>
+        ))}
+    </List>
+);
+
+const List = styled.ul`
+    a {
+        padding: 15px 30px;
+        display: block;
+        color: inherit;
+    }
+`;