add gradle files
ignore local gradle files
add gradle wrapper, issue #126
ignore build dir
include crouton dependency
don't abort check task on lint errors
compile with JDK 1.7
convert switch with android resources to if-else, see http://tools.android.com/tips/non-constant-fields
enable unit tests
run gradle tests on Travis
Merge branch 'master' into gradle

Conflicts:
	.gitignore
	.travis.yml
	ChangeLog
update dependencies
Merge branch 'master' into gradle
use junit 4.11
add github token to update buildtrend
use gradle 1.12
use build-tools 19.1.0
use gradle android plugin 0.9.0
add reference to example config file [skip ci]
use gradle 1.10

Other versions are not compatible with android gradle plugin 0.9.0