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/LICENSE

@@ -0,0 +1,54 @@
+Copyright (c) 2017, Tom Thorogood.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the Tom Thorogood nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+---- Portions of the source code are also covered by the following license: ----
+
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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
+}