[0.012] church climbing & cart jumping exploit

Description: it's possible to climb on the church or to jump on the wall at the beginning of the area



Steps to reproduce :
1. Run and jump on the window
2. Quickly: jump & air control to land on the pillar
3. U turn
4. Jump on the Silver robot hidding place roof.



Steps to reproduce :
1. Jump on the cart
2. Jump toward the asperity of the wall
3. Jump multiple time

Result: The player can go places where he shouldn't

I only fixed the second one because you can go off the map. The first one does not harm.
Fixed in version 0.013. Thank you!