Contribution guidelines (#72)
Contribution guidelines (#72)

* Add contribution guidelines

* wording

lazycrafter/craft-route-android,LeNcE1/TestAndroid,harry-nguyen-88/AndroidBoilerPlateTesting,mjolk/android-boilerplate,ribot/android-boilerplate,rafalzawadzki/CircleCI-test,viniciussoares/android-boilerplate