routing: Move tools inside lnd. Refactor and delete unneeded stuff

Use [33]byte for graph vertex representation.
Delete unneeded stuff:
1. DeepEqual for graph comparison
2. EdgePath
3. 2-thread BFS
4. Table transfer messages and neighborhood radius
5. Beacons

Refactor:
1. Change ID to Vertex
2. Test use table driven approach
3. Add comments
4. Make graph internal representation private
5. Use wire.OutPoint as  EdgeId
6. Decouple routing messages from routing implementation
7. Delete Async methods
8. Delete unneeded channels and priority buffer from manager
9. Delete unneeded interfaces in internal graph realisation
10. Renamed ID to Vertex

routing/rt/visualizer/config.go

@@ -0,0 +1,125 @@
+// Copyright (c) 2016 Bitfury Group Limited
+// Distributed under the MIT software license, see the accompanying
+// file LICENSE or http://www.opensource.org/licenses/mit-license.php
+
+package visualizer
+
+// Configuration used for graph visualisation.
+type VisualizerConfig struct {
+	// General options.
+	GlobalCfg          *GlobalConfig
+	// Options for node visualisation.
+	NodeCfg            *NodeConfig
+	// Options ofr highlighted nodes visualisation.
+	HighlightedNodeCfg *NodeConfig
+	// Options for edges visualisation.
+	EdgeCfg            *EdgeConfig
+	// Options for highlighted edges visualisation.
+	HighlightedEdgeCfg *EdgeConfig
+	// Indicate whether shortcuts should be used.
+	// Shortcut of a string is a prefix of a string that is unique
+	// for a given set of strings.
+	EnableShortcut     bool
+}
+
+var DefaultVisualizerConfig VisualizerConfig = VisualizerConfig{
+	GlobalCfg:          &DefaultGlobalConfig,
+	NodeCfg:            &DefaultNodeConfig,
+	HighlightedNodeCfg: &DefaultHighlightedNodeConfig,
+	EdgeCfg:            &DefaultEdgeConfig,
+	HighlightedEdgeCfg: &DefaultHighlightedEdgeConfig,
+	EnableShortcut:     false,
+}
+
+type GlobalConfig struct {
+	// Title of an image.
+	Name    string
+	Dir     bool
+	// Allow multigraph.
+	Strict  bool
+	// Background color.
+	BgColor string
+}
+
+var DefaultGlobalConfig GlobalConfig = GlobalConfig{
+	Name:    `"Routing Table"`,
+	Dir:     true,
+	Strict:  false, // Allow multigraphs
+	BgColor: "black",
+}
+
+type NodeConfig struct {
+	Shape     string
+	Style     string
+	FontSize  string
+	FontColor string
+	Color     string
+	FillColor string
+}
+
+var DefaultNodeConfig NodeConfig = NodeConfig{
+	Shape:     "circle",
+	Style:     "filled",
+	FontSize:  "12",
+	FontColor: "black",
+	Color:     "white",
+	FillColor: "white",
+}
+
+var DefaultHighlightedNodeConfig NodeConfig = NodeConfig{
+	Shape:     "circle",
+	Style:     "filled",
+	FontSize:  "12",
+	FontColor: "black",
+	Color:     "blue",
+	FillColor: "blue",
+}
+
+type EdgeConfig struct {
+	FontSize  string
+	FontColor string
+	Scale     string
+	Dir       string
+	Style     string
+	Color     string
+}
+
+var DefaultEdgeConfig EdgeConfig = EdgeConfig{
+	FontSize:  "12",
+	FontColor: "gold",
+	Scale:     "2.5",
+	Dir:       "none",
+	Style:     "solid",
+	Color:     "white",
+}
+
+var DefaultHighlightedEdgeConfig EdgeConfig = EdgeConfig{
+	FontSize:  "12",
+	FontColor: "gold",
+	Scale:     "2.5",
+	Dir:       "none",
+	Style:     "solid",
+	Color:     "blue",
+}
+
+func SupportedFormatsAsMap() map[string]struct{} {
+	rez := make(map[string]struct{})
+	for _, format := range supportedFormats {
+		rez[format] = struct{}{}
+	}
+	return rez
+}
+
+// SupportedFormats contains list of image formats that can be
+// used for output.
+func SupportedFormats() []string {
+	return supportedFormats
+}
+
+var supportedFormats = []string{
+	"bmp", "canon", "cgimage", "cmap", "cmapx", "cmapx_np", "dot", "eps", "exr",
+	"fig", "gif", "gv", "icns", "ico", "imap", "imap_np", "ismap", "jp2", "jpe",
+	"jpeg", "jpg", "pct", "pdf", "pic", "pict", "plain", "plain-ext", "png",
+	"pov", "ps", "ps2", "psd", "sgi", "svg", "svgz", "tga", "tif", "tiff", "tk",
+	"vml", "vmlz", "xdot", "xdot1.2", "xdot1.4",
+}