Notification Shortcuts & WiFi display (1 of 2)

I wanted to do this as a pull request so anybody could comment on this prior to it being pushed to the repo, just in case anybody has any concerns or objections to including this. 

This commit adds the notification shortcuts to the notification panel and also the option to display the current WiFi Network connected to, and is ported from Slimroms.

Screenshot 1: http://i49.tinypic.com/333wff6.png
Screenshot 2: http://i50.tinypic.com/2uh2y45.png

Compiled and tested with v21.0.0, all items working well.

Framework resources added which include shortcut icons for a number of common applications, resolutions included are: hdpi, mdpi & xhdpi.

Change-Id: I09af9a1fbc650a39aeb1a135f1300bc20cfac222