- Update Opera and jQuery links

- Use `https://` (fix #172), including in prompt for URL and relevant code comments (where available and naturally not on namespaces)
- Comment out broken link in svg-editor.html
- Trailing space

editor/js-hotkeys/README.md

@@ -1,15 +1,15 @@
 #About
 **jQuery Hotkeys** is a plug-in that lets you easily add and remove handlers for keyboard events anywhere in your code supporting almost any key combination.  
 
-This plugin is based off of the plugin by Tzury Bar Yochay: [jQuery.hotkeys](http://github.com/tzuryby/hotkeys)
+This plugin is based off of the plugin by Tzury Bar Yochay: [jQuery.hotkeys](https://github.com/tzuryby/hotkeys)
 
 The syntax is as follows:
 
     $(expression).bind(types, keys, handler);
     $(expression).unbind(types, handler);
-    
+
     $(document).bind('keydown', 'ctrl+a', fn);
-    
+
     // e.g. replace '$' sign with 'EUR'
     $('input.foo').bind('keyup', '$', function(){
       this.value = this.value.replace('$', 'EUR');
@@ -42,4 +42,4 @@ Firefox is the most liberal one in the manner of letting you capture all short-c
 
 Others, (IE) either let you handle built-in short-cuts, but will add their functionality after your code has executed. Or (Opera/Safari) will *not* pass those events to the DOM at all.
 
-*So, if you bind `Ctrl-Q` or `Alt-F4` and your Safari/Opera window is closed don't be surprised.*
+*So, if you bind `Ctrl-Q` or `Alt-F4` and your Safari/Opera window is closed don't be surprised.*