Save the Puppies

Added rewarded videos
Android M support
Internal updates and optimizations

Earlier:
- Fixed steps not correctly replenishing in the background
- Added support for non touchscreen devices
- Game Controller support
- Performance improvements
- Added support for Google Play game services. Sign in with your Google+ account to access online leaderboards and 36 achievements.
- 4 new ranks
- Line of sight display for cats and dogs