update project to lollipop
restore SDK to 19
test travis with sdk 21
fix support dependencies to 21.0.0
add extra-android-support dependency in travis
add extra-android-m2repository dependency in travis
fix support dependencies to 21.+
fix android tools build gradle to 0.13.+
fix android tools build gradle to 0.13.+
Merge pull request #3 from Guardiola31337/master

Update project to Lollipop