Add WP81 sandbox sample; move sandbox out of src
Undo sound.ts
Merge branch 'master' of https://github.com/eonarheim/Excalibur into dev-kamran
Change spec shell task

- Updated shell:tests to glob spec files instead of manual list
- Build should fail now
Fix test proj
Merge pull request #329 from excaliburjs/dev-erik

Particles support sprites, added some math Util functions
Merge pull request #333 from excaliburjs/dev-erik

Merge pipeline change and removeEffect
Merge pull request #336 from excaliburjs/dev-erik

Close #335 fix null promise return on game.start()
Merge pull request #342 from excaliburjs/dev-erik

Merge Promise fixes and basic camera interpolation
Specify TS version explicitly in build command
Manual merge of @spirinvladimir pull request

- Fixed casing of dist path
Merge master to dev-kamran
Compile/finish merge
Progress on new input eventing
Support FF
Documentation for Gamepads
Update sandbox with new APIs
Publish gamepad events on individual pads
Update path to sandbox ts
Add multi-init calls to fix controller added post load