Merge branch 'release/0.0.4' into develop
+ 0.0.5-1  start converting tryout to the real app
+ 0.0.5-2  preload and display background and sprite images
+ 0.0.5-3  basic game mechanic working
Merge branch 'feature/convert-tryout-to-real-app' into develop
+ 0.0.6    basic game mechanic ready for testing
Merge branch 'release/0.0.6' into gh-pages