added DOM Element functionality for edit's selector parameter

+ edit now accepts a DOM Element for the "selector" attribute (as well
as being able to pass a selector like before
+ you may now omit the "inputType" parameter and specify "parent" in its
place

Did this for one reason: to add point-and-click editing functionality.
By attaching a "click" event listener to the document and calling:
scribly.edit(e.target, [parent]);
as its callback you can allow your users to edit inline elements on the
fly with a single click.

src/scribly.js

@@ -10,10 +10,19 @@ var scribly = {
 	edit: function(selector, inputType, parent) {
 		var elements, parentElement, editSId, elementSId, elementSIdName, elementInput; //SId is short for Scribly ID
 
-		inputType = inputType || 'text';
-		parentElement = parent || document;
+		if(arguments[1].tagName) {
+			parentElement = arguments[1];
+			inputType = 'text';
+		}
+		else {
+			parentElement = parent || document;
+			inputType = inputType || 'text';
+		}
 
-		elements = parentElement.querySelectorAll(selector);
+    	if(arguments[0].tagName && arguments[0].parentNode === parentElement)
+    		elements = [arguments[0]];
+    	else
+			elements = parentElement.querySelectorAll(selector);
 
 		var i = 0;
 		for(i=0; i<elements.length; i++) {