Merge pull request #71 from tribal-tec/master

Doubletap fix, fullscreen/minimize feature, cppcheck fixes
Test

Change-Id: I58e6693beefacd109cc5daf260313dcab9945853
Add first unit test for content window manager

Change-Id: I9d42bb2e2a9a6b13cce5a455e160be182429d69b