[CHG] More xml layouts implement the component title_bar (thinking about
switching to ActionBarSherlock)
[DEL] Removed unused code and unneeded comments
[ADD] Implemented SlidingDrawer for more menu options (but can only be
inverted from API Level 11 and is deprecated in API 17 -> switching to
library 'SlidingMenu' from github)
[DEL] Removed unused/not seen code in title bar section
[ADD] Action Bar Sherlock + SlidingMenu to the project - many changes
regarding our old title bar structure (should be removed completed
anytime soon)
[CHG/FIX] Many fixes and refactorings

TODO: 
- Get refresh + progress indicator in action bar working correctly
- Open sliding menu on icon click
- Make sliding menu items work :P
- Further functionality in title bar / implement preferences again and
so on