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, 100 insertions, 0 deletions

diff --git a/vendor/github.com/peterh/liner/README.md b/vendor/github.com/peterh/liner/README.md
new file mode 100644
index 000000000..9148b2492
--- /dev/null
+++ b/vendor/github.com/peterh/liner/README.md
@@ -0,0 +1,100 @@
+Liner
+=====
+
+Liner is a command line editor with history. It was inspired by linenoise;
+everything Unix-like is a VT100 (or is trying very hard to be). If your
+terminal is not pretending to be a VT100, change it. Liner also support
+Windows.
+
+Liner is released under the X11 license (which is similar to the new BSD
+license).
+
+Line Editing
+------------
+
+The following line editing commands are supported on platforms and terminals
+that Liner supports:
+
+Keystroke    | Action
+---------    | ------
+Ctrl-A, Home | Move cursor to beginning of line
+Ctrl-E, End  | Move cursor to end of line
+Ctrl-B, Left | Move cursor one character left
+Ctrl-F, Right| Move cursor one character right
+Ctrl-Left, Alt-B    | Move cursor to previous word
+Ctrl-Right, Alt-F   | Move cursor to next word
+Ctrl-D, Del  | (if line is *not* empty) Delete character under cursor
+Ctrl-D       | (if line *is* empty) End of File - usually quits application
+Ctrl-C       | Reset input (create new empty prompt)
+Ctrl-L       | Clear screen (line is unmodified)
+Ctrl-T       | Transpose previous character with current character
+Ctrl-H, BackSpace | Delete character before cursor
+Ctrl-W       | Delete word leading up to cursor
+Ctrl-K       | Delete from cursor to end of line
+Ctrl-U       | Delete from start of line to cursor
+Ctrl-P, Up   | Previous match from history
+Ctrl-N, Down | Next match from history
+Ctrl-R       | Reverse Search history (Ctrl-S forward, Ctrl-G cancel)
+Ctrl-Y       | Paste from Yank buffer (Alt-Y to paste next yank instead)
+Tab          | Next completion
+Shift-Tab    | (after Tab) Previous completion
+
+Getting started
+-----------------
+
+```go
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/peterh/liner"
+)
+
+var (
+	history_fn = filepath.Join(os.TempDir(), ".liner_example_history")
+	names      = []string{"john", "james", "mary", "nancy"}
+)
+
+func main() {
+	line := liner.NewLiner()
+	defer line.Close()
+
+	line.SetCtrlCAborts(true)
+
+	line.SetCompleter(func(line string) (c []string) {
+		for _, n := range names {
+			if strings.HasPrefix(n, strings.ToLower(line)) {
+				c = append(c, n)
+			}
+		}
+		return
+	})
+
+	if f, err := os.Open(history_fn); err == nil {
+		line.ReadHistory(f)
+		f.Close()
+	}
+
+	if name, err := line.Prompt("What is your name? "); err == nil {
+		log.Print("Got: ", name)
+		line.AppendHistory(name)
+	} else if err == liner.ErrPromptAborted {
+		log.Print("Aborted")
+	} else {
+		log.Print("Error reading line: ", err)
+	}
+
+	if f, err := os.Create(history_fn); err != nil {
+		log.Print("Error writing history file: ", err)
+	} else {
+		line.WriteHistory(f)
+		f.Close()
+	}
+}
+```
+
+For documentation, see http://godoc.org/github.com/peterh/liner