Added a Market Button

At the moment it only says M as I inserted an android:titleCondensed
because I couldn't find a way to simply shorten the widths of the
elements in the menu and with the full spelling of Market, it squished
up the logo in the corner.
implemented actionbar items function
Adds sections; subsection titles and DummyClasses
Added first Client-implementation
Edited Client-example (now using init-method)
Adds section icons
Removed ActionBar- and Launcher-icons. Added ActionBar- (mdpi, hdpi) and Launcher-icons (hdpi).
Added HTTP-POST support and updated example-code.
Improved ActionBar-icons
Car-Data listener class with OO-data-structure
Clean-up, adding comments
adding the exlap.jar to the git ignore file

just to be sure that this file won't be committed
Merge branch 'master' of github.com:da-owl/swp-ucd-2013-eule into auth
auth (login/register) implemented, restful framework added/