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.

tools/vendor/github.com/tmthrgd/go-bindata/debug.go

@@ -0,0 +1,84 @@
+// 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 bindata
+
+import "text/template"
+
+func init() {
+	template.Must(template.Must(template.Must(baseTemplate.New("debug").Funcs(template.FuncMap{
+		"format": formatTemplate,
+	}).Parse(`import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+{{- if $.AssetDir}}
+	"strings"
+{{- end}}
+{{- if $.Restore}}
+
+	"github.com/tmthrgd/go-bindata/restore"
+{{- end}}
+)
+
+// AssetAndInfo loads and returns the asset and asset info for the
+// given name. It returns an error if the asset could not be found
+// or could not be loaded.
+func AssetAndInfo(name string) ([]byte, os.FileInfo, error) {
+	path, ok := _bindata[filepath.ToSlash(name)]
+	if !ok {
+		return nil, nil, &os.PathError{Op: "open", Path: name, Err: os.ErrNotExist}
+	}
+
+{{- if $.Dev}}
+
+	path = filepath.Join(rootDir, path)
+{{- end}}
+
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	fi, err := os.Stat(path)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return data, fi, nil
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	path, ok := _bindata[filepath.ToSlash(name)]
+	if !ok {
+		return nil, &os.PathError{Op: "open", Path: name, Err: os.ErrNotExist}
+	}
+
+{{- if $.Dev}}
+
+	path = filepath.Join(rootDir, path)
+{{- end}}
+	return os.Stat(path)
+}
+
+// _bindata is a table, mapping each file to its path.
+{{if $.Dev -}}
+	{{format "bindata-dev" $}}
+{{- else -}}
+	{{format "bindata-debug" $}}
+{{- end}}`)).New("bindata-debug").Parse(`
+var _bindata = map[string]string{
+{{range .Assets -}}
+	{{printf "%q" .Name}}: {{printf "%q" .AbsolutePath}},
+{{end -}}
+}`)).New("bindata-dev").Parse(`
+var _bindata = map[string]string{
+{{range .Assets -}}
+	{{printf "%q" .Name}}: {{printf "%q" .Name}},
+{{end -}}
+}`))
+}