Commited dependencies

vendor/github.com/lunixbochs/vtclean/README.md

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+[![Build Status](https://travis-ci.org/lunixbochs/vtclean.svg?branch=master)](https://travis-ci.org/lunixbochs/vtclean)
+
+vtclean
+----
+
+Clean up raw terminal output by stripping escape sequences, optionally preserving color.
+
+Get it: `go get github.com/lunixbochs/vtclean/vtclean`
+
+API:
+
+    import "github.com/lunixbochs/vtclean"
+    vtclean.Clean(line string, color bool) string
+
+Command line example:
+
+    $ echo -e '\x1b[1;32mcolor example
+    color forced to stop at end of line
+    backspace is ba\b\bgood
+    no beeps!\x07\x07' | ./vtclean -color
+
+    color example
+    color forced to stop at end of line
+    backspace is good
+    no beeps!
+
+Go example:
+
+    package main
+
+    import (
+        "fmt"
+        "github.com/lunixbochs/vtclean"
+    )
+
+    func main() {
+        line := vtclean.Clean(
+            "\033[1;32mcolor, " +
+            "curs\033[Aor, " +
+            "backspace\b\b\b\b\b\b\b\b\b\b\b\033[K", false)
+        fmt.Println(line)
+    }
+
+Output:
+
+    color, cursor