Add debug value in the _internal object in order to disable the debug logging. Closes #79

Disable the debug logging by default
Update README.md to add information about debug

Author: nyroDev

README.md

@@ -249,3 +249,16 @@ Here is a list of the filters officially provided:
 * Embedly: Used to show a bunch of different element using [embedly API](http://embed.ly/) ([Examples](http://nyromodal.nyrodev.com/v2/embedly.php)) (depends on link)
 
 ##Animations
+
+
+##Debug
+In order to enable the debug mode, you should change the debug value of the internal object. You can do it like:
+    $.nmInternal({debug: true});
+
+By default, the debug function show function name in the console. If you want do something else, you should overwrite the _debug function like:
+    $.nmInternal({
+      _debug: function(msg) {
+        if (this.debug && window.console && window.console.log)
+          window.console.log(msg);
+      }
+    });

js/jquery.nyroModal.js

@@ -502,6 +502,7 @@ jQuery(function($, undefined) {
 		},
 		_internal = {
 			firstInit: true,
+			debug: false,
 			stack: [],
 			fullSize: {
 				w: 0,
@@ -564,7 +565,7 @@ jQuery(function($, undefined) {
 			},
 
 			_debug: function(msg) {
-				if (window.console && window.console.log)
+				if (this.debug && window.console && window.console.log)
 					window.console.log(msg);
 			},