changing the logic behind ngJq to be more robust; removing jQuery = window[jqName] for when jqName is empty string

Author: Michel Boudreau

src/Angular.js

@@ -950,7 +950,7 @@ var jq = function() {
 
   var name;
   if (el) {
-    name = getNgAttribute(el, "jq") || '';
+    name = getNgAttribute(el, "jq");
   }
 
   return (jq.name_ = name);
@@ -1528,7 +1528,10 @@ function bindJQuery() {
 
   // bind to jQuery if present;
   var jqName = jq();
-  jQuery = jqName != null ? window[jqName] : window.jQuery;
+	jQuery = window.jQuery; // use default jQuery.
+	if (isDefined(jqName)) { // `ngJq` present
+		jQuery = jqName === null ? undefined : window[jqName]; // if empty; use jqLite. if not empty, use jQuery specified by `ngJq`.
+	}
 
   // Use jQuery if it exists with proper functionality, otherwise default to us.
   // Angular 1.2+ requires jQuery 1.7+ for on()/off() support.