Util: Calculate tween yoyos

Yoyoing back to origin has to have an odd number of repeats. Solve this
by using the new backForth for TweenMax or the calcYoyo if you want the
number of repeats for other purposes.
Use Phaser randomiser, Birdhero touch ups
Birdhero: Updated graphics
Hack & /

Code cleanup, especially agent related
Update to agent graphics

This undos a lot in previous commit.
Remove remaining asset
TimelineMax.addSound now takes a position param
Garden: Updates for agent
Birdhero: Coordinate change
Merge remote-tracking branch 'upstream/master'
Specific + - representation only for baloongame