Close #270 Excalibur comes with a default camera
Close #182 Reorganize code into file per type
Close #285 Refactor CollisionMaps to TileMaps improve collision logic
Fix #283 Animations from SpriteSheets can have repeated frames
Merge branch 'master' of github.com:eonarheim/Excalibur into dev-erik
Merge pull request #304 from excaliburjs/dev-erik

Merge #270, #182, #285, #283