updates to climber model

The BarManager class handles the balance and energy meters. If the
energy runs out, it tells the body to fall. Hopefully, the climbing
controls are more smooth/realistic now. The bug where the player can
basically carry the model by holding down the mouse button still exists,
but once they let go, the model's going to fall. Perhaps I'll make the
BarManager also keep track whether or not the limbs are holding onto
something like in our original plan.
I forgot to zero the prefab position

OCD >.>
Merge pull request #11 from jnguye14/Temp-Jordan

Temp jordan