Add vendor files for go build

vendor/github.com/alecthomas/chroma/quick/quick.go

@@ -0,0 +1,44 @@
+// Package quick provides simple, no-configuration source code highlighting.
+package quick
+
+import (
+	"io"
+
+	"github.com/alecthomas/chroma"
+	"github.com/alecthomas/chroma/formatters"
+	"github.com/alecthomas/chroma/lexers"
+	"github.com/alecthomas/chroma/styles"
+)
+
+// Highlight some text.
+//
+// Lexer, formatter and style may be empty, in which case a best-effort is made.
+func Highlight(w io.Writer, source, lexer, formatter, style string) error {
+	// Determine lexer.
+	l := lexers.Get(lexer)
+	if l == nil {
+		l = lexers.Analyse(source)
+	}
+	if l == nil {
+		l = lexers.Fallback
+	}
+	l = chroma.Coalesce(l)
+
+	// Determine formatter.
+	f := formatters.Get(formatter)
+	if f == nil {
+		f = formatters.Fallback
+	}
+
+	// Determine style.
+	s := styles.Get(style)
+	if s == nil {
+		s = styles.Fallback
+	}
+
+	it, err := l.Tokenise(nil, source)
+	if err != nil {
+		return err
+	}
+	return f.Format(w, s, it)
+}