Clean up the scripts a bit (...)

- Move the Go files into script/ instead of random places
- Rewrite check-contrib.sh into check-authors.go and check-copyright.go
- Clean up build.sh a little bit

script/benchfilter.go

@@ -0,0 +1,46 @@
+// Copyright (C) 2015 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build ignore
+
+// Neatly format benchmarking output which otherwise looks like crap.
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+	"text/tabwriter"
+)
+
+var (
+	benchRe = regexp.MustCompile(`^(Bench[^\s]+)\s+(\d+)\s+(\d+ ns/op)\s*(\d+ B/op)?\s*(\d+ allocs/op)?`)
+)
+
+func main() {
+	tw := tabwriter.NewWriter(os.Stdout, 1, 1, 1, ' ', 0)
+	br := bufio.NewScanner(os.Stdin)
+	n := 0
+
+	for br.Scan() {
+		line := br.Text()
+
+		if match := benchRe.FindStringSubmatch(line); match != nil {
+			n++
+			for i := range match[2:] {
+				match[2+i] = fmt.Sprintf("%16s", match[2+i])
+			}
+			tw.Write([]byte(strings.Join(match[1:], "\t") + "\n"))
+		} else if n > 0 && strings.HasPrefix(line, "ok") {
+			n = 0
+			tw.Flush()
+			fmt.Printf("%s\n\n", line)
+		}
+	}
+	tw.Flush()
+}