Add definitions for pitch/yaw

Not common terminology, probably deserves clarification. In fact, I've never really known what yaw was until I looked it up yesterday.
Merge pull request #54 from timoxley/patch-1

Add definitions for pitch/yaw
Don't throw errors if no player is set up to control.
Merge pull request #55 from timoxley/feature/dont-break-if-no-control

Don't throw errors if no player is set up to control.
introduce game.arrayType && game.blocks
Don't mess with camera position
Merge pull request #56 from timoxley/feature/dont-break-if-no-control

Don't mess with camera position
Return item after addItem
Merge pull request #57 from shama/returnitem

Return item after addItem