Allow for installation on SD card.
moved signing config to platform specific file, should now work with android studio
Merge branch 'master' of https://github.com/sandsmark/QuasselDroid
Merge branch 'sdcard' of https://github.com/mamarley/QuasselDroid into mamarley-sdcard

Conflicts:
	QuasselDroid/src/main/AndroidManifest.xml