Add a savetiddler command

It saves tiddlers in their original, unrendered format

core/modules/commands/savetiddler.js

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+/*\
+title: $:/core/modules/commands/savetiddler.js
+type: application/javascript
+module-type: command
+
+Command to save the content of a tiddler to a file
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+exports.info = {
+	name: "savetiddler",
+	synchronous: false
+};
+
+var Command = function(params,commander,callback) {
+	this.params = params;
+	this.commander = commander;
+	this.callback = callback;
+};
+
+Command.prototype.execute = function() {
+	if(this.params.length < 2) {
+		return "Missing filename";
+	}
+	var self = this,
+		fs = require("fs"),
+		path = require("path"),
+		title = this.params[0],
+		filename = this.params[1],
+		tiddler = this.commander.wiki.getTiddler(title),
+		type = tiddler.fields.type || "text/vnd.tiddlywiki",
+		contentTypeInfo = $tw.config.contentTypeInfo[type] || {encoding: "utf8"};
+	fs.writeFile(filename,tiddler.fields.text,contentTypeInfo.encoding,function(err) {
+		self.callback(err);
+	});
+	return null;
+};
+
+exports.Command = Command;
+
+})();

editions/tw5.com/tiddlers/commands/SaveTiddlerCommand.tid

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+title: SaveTiddlerCommand
+tags: command
+created: 20131218121606089
+modified: 20131218121606089
+
+Saves an individual tiddler in its raw text or binary format to the specified filename. 
+
+```
+--savetiddler <title> <filename>
+```