Improvements to polyobjects carrying things

• Fixed loss of precision in rotate carry causing objects to slide off
• Adjusted player carrying logic to make platforms less slippery
• Finally obsoleted the player-specific rotate hack now that I found the actual problem :]

Take this for a spin in CEZ2 and the rotating platforms should immediately feel 26x better

p-pwease, i beg of wu ;_;

changed milestone to %2.2.2

merged

mentioned in commit 9bf0cfda