Use appcompat namespace in menu.xml.

Fixes Lint warning.
Ignore Lint warning about inconsistent layout.

The activity_main layout is inconsistent on purpose: allows master-detail mode in large screens.
Removed unused string resources.
Use <merge> to replace useless FrameLayout.

Learned something new today: http://android-developers.blogspot.nl/2009/03/android-layout-tricks-3-optimize-by.html. Thank, lint!
Updated version for release 1.0.1.