// File I/O 
	readFrom : function(aFile) 
	{
		var stream = Components.classes['@mozilla.org/network/file-input-stream;1'].createInstance(Components.interfaces.nsIFileInputStream);
		stream.init(aFile, 1, 0, false); // open as "read only"

		var scriptableStream = Components.classes['@mozilla.org/scriptableinputstream;1'].createInstance(Components.interfaces.nsIScriptableInputStream);
		scriptableStream.init(stream);

		var fileSize = scriptableStream.available();
		var fileContents = scriptableStream.read(fileSize);

		scriptableStream.close();
		stream.close();

		return fileContents;
	},