Godeps, vendor: convert dependency management to trash (#3198)

This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.

1 files changed, 0 insertions, 151 deletions

diff --git a/Godeps/_workspace/src/github.com/fatih/color/README.md b/Godeps/_workspace/src/github.com/fatih/color/README.md
deleted file mode 100644
index d6fb06a3e..000000000
--- a/Godeps/_workspace/src/github.com/fatih/color/README.md
+++ /dev/null
@@ -1,151 +0,0 @@
-# Color [![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/fatih/color) [![Build Status](http://img.shields.io/travis/fatih/color.svg?style=flat-square)](https://travis-ci.org/fatih/color)
-
-
-
-Color lets you use colorized outputs in terms of [ANSI Escape Codes](http://en.wikipedia.org/wiki/ANSI_escape_code#Colors) in Go (Golang). It has support for Windows too! The API can be used in several ways, pick one that suits you.
-
-
-
-![Color](http://i.imgur.com/c1JI0lA.png)
-
-
-## Install
-
-```bash
-go get github.com/fatih/color
-```
-
-## Examples
-
-### Standard colors
-
-```go
-// Print with default helper functions
-color.Cyan("Prints text in cyan.")
-
-// A newline will be appended automatically
-color.Blue("Prints %s in blue.", "text")
-
-// These are using the default foreground colors
-color.Red("We have red")
-color.Magenta("And many others ..")
-
-```
-
-### Mix and reuse colors
-
-```go
-// Create a new color object
-c := color.New(color.FgCyan).Add(color.Underline)
-c.Println("Prints cyan text with an underline.")
-
-// Or just add them to New()
-d := color.New(color.FgCyan, color.Bold)
-d.Printf("This prints bold cyan %s\n", "too!.")
-
-// Mix up foreground and background colors, create new mixes!
-red := color.New(color.FgRed)
-
-boldRed := red.Add(color.Bold)
-boldRed.Println("This will print text in bold red.")
-
-whiteBackground := red.Add(color.BgWhite)
-whiteBackground.Println("Red text with white background.")
-```
-
-### Custom print functions (PrintFunc)
-
-```go
-// Create a custom print function for convenience
-red := color.New(color.FgRed).PrintfFunc()
-red("Warning")
-red("Error: %s", err)
-
-// Mix up multiple attributes
-notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
-notice("Don't forget this...")
-```
-
-### Insert into noncolor strings (SprintFunc)
-
-```go
-// Create SprintXxx functions to mix strings with other non-colorized strings:
-yellow := color.New(color.FgYellow).SprintFunc()
-red := color.New(color.FgRed).SprintFunc()
-fmt.Printf("This is a %s and this is %s.\n", yellow("warning"), red("error"))
-
-info := color.New(color.FgWhite, color.BgGreen).SprintFunc()
-fmt.Printf("This %s rocks!\n", info("package"))
-
-// Use helper functions
-fmt.Printf("This", color.RedString("warning"), "should be not neglected.")
-fmt.Printf(color.GreenString("Info:"), "an important message." )
-
-// Windows supported too! Just don't forget to change the output to color.Output
-fmt.Fprintf(color.Output, "Windows support: %s", color.GreenString("PASS"))
-```
-
-### Plug into existing code
-
-```go
-// Use handy standard colors
-color.Set(color.FgYellow)
-
-fmt.Println("Existing text will now be in yellow")
-fmt.Printf("This one %s\n", "too")
-
-color.Unset() // Don't forget to unset
-
-// You can mix up parameters
-color.Set(color.FgMagenta, color.Bold)
-defer color.Unset() // Use it in your function
-
-fmt.Println("All text will now be bold magenta.")
-```
-
-### Disable color
-
-There might be a case where you want to disable color output (for example to
-pipe the standard output of your app to somewhere else). `Color` has support to
-disable colors both globally and for single color definition. For example
-suppose you have a CLI app and a `--no-color` bool flag. You can easily disable
-the color output with:
-
-```go
-
-var flagNoColor = flag.Bool("no-color", false, "Disable color output")
-
-if *flagNoColor {
-	color.NoColor = true // disables colorized output
-}
-```
-
-It also has support for single color definitions (local). You can
-disable/enable color output on the fly:
-
-```go
-c := color.New(color.FgCyan)
-c.Println("Prints cyan text")
-
-c.DisableColor()
-c.Println("This is printed without any color")
-
-c.EnableColor()
-c.Println("This prints again cyan...")
-```
-
-## Todo
-
-* Save/Return previous values
-* Evaluate fmt.Formatter interface
-
-
-## Credits
-
- * [Fatih Arslan](https://github.com/fatih)
- * Windows support via @shiena: [ansicolor](https://github.com/shiena/ansicolor)
-
-## License
-
-The MIT License (MIT) - see [`LICENSE.md`](https://github.com/fatih/color/blob/master/LICENSE.md) for more details
-