make links clickable and highlighted @feature

I made only clickable links. With highlighting I had some problems. Need to read manual by tmLanguage. 
Actually links are not clickable. For open link in browser you need to point it with caret and click "super+shift+u".

BTW Python isn't mine primary PL. So if something wrong with this code don't hesitate to tell me.))
 
And last but not least - thank you for so great plugin. I use it every day. And will be glad to help you.