Button API created (untested)

Change-Id: Iccda2d6365dfff7dd7ee2992cded4b371e76bd45
Signed-off-by: Tobias <pahlings@gmail.com>
Button Grafiken added

Change-Id: Idc0c4fdd0b9c41577d7a82d4d3ffd14a203c2338
Signed-off-by: Tobias <pahlings@gmail.com>
Erste Demos für Buttons (exit & pause)

Change-Id: I49f3461829d72610e07739285da824da988e84b5
Signed-off-by: Tobias <pahlings@gmail.com>
Merge branch 'master' of https://github.com/topahl/die-Strasse.git