Refactor repository layout and convert build system to Mage.

This commit implements a massive refactor of the repository, and
moves the build system over to use Mage (magefile.org) which should
allow seamless building across multiple platforms.

vendor/github.com/tmthrgd/go-bindata/restore/restore.go

@@ -0,0 +1,57 @@
+// Copyright 2017 Tom Thorogood. All rights reserved.
+// Use of this source code is governed by a Modified
+// BSD License that can be found in the LICENSE file.
+
+// Package restore provides the restore API that was
+// previously embedded into the generated output.
+package restore
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+// AssetAndInfo represents the generated AssetAndInfo method.
+type AssetAndInfo func(name string) (data []byte, info os.FileInfo, err error)
+
+// AssetDir represents the generated AssetDir method.
+type AssetDir func(name string) (children []string, err error)
+
+// Asset restores an asset under the given directory
+func Asset(dir, name string, assetAndInfo AssetAndInfo) error {
+	path := filepath.Join(dir, filepath.FromSlash(name))
+
+	data, info, err := assetAndInfo(name)
+	if err != nil {
+		return err
+	}
+
+	if err = os.MkdirAll(filepath.Dir(path), 0755); err != nil {
+		return err
+	}
+
+	if err = ioutil.WriteFile(path, data, info.Mode()); err != nil {
+		return err
+	}
+
+	return os.Chtimes(path, info.ModTime(), info.ModTime())
+}
+
+// Assets restores an asset under the given directory recursively
+func Assets(dir, name string, assetDir AssetDir, assetAndInfo AssetAndInfo) error {
+	children, err := assetDir(name)
+	// File
+	if err != nil {
+		return Asset(dir, name, assetAndInfo)
+	}
+
+	// Dir
+	for _, child := range children {
+		if err = Assets(dir, filepath.Join(name, child), assetDir, assetAndInfo); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}