Merge branch 'dev' into 'master'

CheckersClient/.idea/caches/build_file_checksums.ser

....idea/libraries/Gradle__org_javatuples_javatuples_1_2.xml

CheckersClient/android/assets/Game/1.5x/Backgroundhdpi.png

CheckersClient/android/assets/Game/1.5x/Borderhdpi.png

CheckersClient/android/assets/Game/1.5x/Computerhdpi.png

CheckersClient/android/assets/Game/1.5x/ExerciseTexthdpi.png

CheckersClient/android/assets/Game/1.5x/Playerhdpi.png

...kersClient/android/assets/Game/1.5x/ScoreComputerhdpi.png

CheckersClient/android/assets/Game/1.5x/ScorePlayerhdpi.png

CheckersClient/android/assets/Game/1x/Backgroundmdpi.png

CheckersClient/android/assets/Game/1x/Ball.png

CheckersClient/android/assets/Game/1x/BlackHole@1x.png

CheckersClient/android/assets/Game/1x/Border.png

CheckersClient/android/assets/Game/1x/Computer.png

CheckersClient/android/assets/Game/1x/ExerciseText.png

CheckersClient/android/assets/Game/1x/GameBoard@1x.png

CheckersClient/android/assets/Game/1x/PlayBackground.png

CheckersClient/android/assets/Game/1x/Player.png

CheckersClient/android/assets/Game/1x/ScoreComputer.png

CheckersClient/android/assets/Game/1x/ScorePlayer.png