Add a syntax specification to MultiTiddlerFiles

Been playing with the railraod plugin and I thought I'd try my hand at
writing some syntax specs for the MultiTiddlerFiles tiddler.

editions/tw5.com/tiddlers/fileformats/MultiTiddlerFileSyntax.tid

@@ -0,0 +1,29 @@
+created: 20150621181334837
+modified: 20150621181400844
+tags: [[TiddlyWiki on Node.js]]
+title: MultiTiddlerFileSyntax
+type: text/vnd.tiddlywiki
+
+!!! MultiTiddlerFiles
+
+<$railroad text="""
+{<"Header Line">} "Blank Line" {(<"Tiddler Descriptor Line"> | <"Comment Line">)}
+"""/>
+
+!!! Header Line
+
+<$railroad text="""
+<"Identifier"> ":" {"Whitespace"} <"Value"> "New Line"
+"""/>
+
+!!! Tiddler Descriptor Line
+
+<$railroad text="""
+<"File Path"> ":" {"Whitespace"} <"Tiddler Title"> "New Line"
+"""/>
+
+!!! Comment Line
+
+<$railroad text="""
+"#" {("Text" | "Whitespace")} "New Line"
+"""/>

editions/tw5.com/tiddlers/fileformats/MultiTiddlerFiles.tid

@@ -1,5 +1,5 @@
 created: 20140209143652456
-modified: 20140912141738408
+modified: 20150621182140407
 tags: [[TiddlyWiki on Node.js]]
 title: MultiTiddlerFiles
 type: text/vnd.tiddlywiki
@@ -30,3 +30,7 @@ Basics/Version: ~TiddlyWiki Version
 This example defines two tiddlers, [[$:/language/ControlPanel/Basics/Caption]] and [[$:/language/ControlPanel/Basics/Version]].
 
 If a `title` field is specified in the header then it is treated as a prefix for the individual tiddlers defined in the title.
+
+!! Syntax Specification
+
+{{MultiTiddlerFileSyntax}}