[Cleanup] First cleanup: Code.

* Removed unsused code.
* Moved all scripts to the scripts folder.
* Moved test script/unused scripts to subfolder Test Scripts.
* Commented all scripts.
* Moved some (safe) code out into seperate methods.

I tried to keep the modifications to a minimum in order to not break
anything.
[Cleanup] Second cleanup: Unused objects + scene.

* Moved EnemySounds to sepearete game object with same name. (used to be
in world)
* Removed unused assets.
* Moved MoverioTest scene to Scene folder.
* Created subfolder for Gyro, TestScene
[Minor fix] Text + Fire laser

* Removed (duplicate?) fire laser in GameController.
- If this was a vital part of the game, then revert my change (did not
seem to do anything though).
* Added Score, Combo and Health before counters.
- Once again if it was by design to only present with numbers - revert
this commit.