Adding template for keyboard 1 controller.

Removing old controllerinterface file.
Finishing short comment.
Renaming Canvas to GameArena (better).
Adding support for full-screen api. Currently attached to "F" key as a toggle.
Merge branch 'master' into gh-pages

* master:
  Adding support for full-screen api. Currently attached to "F" key as a toggle.
  Renaming Canvas to GameArena (better).
  Adding template for keyboard 1 controller.