Jump, Tether

Jump
- Big Changes
- When jumping, when velocity.z gets very close to 0 (50 currently),
starts jetpack descent function
-- for 0.5 seconds-ish, descent is slowed
-- Afterwords, till pawn hits ground, descent is increased drastically
-- If user uses grapple at any point during this function, function
harakiris and velocity is increased
--- This allows users to harvest the increased downards velocity for
slingshot action w/ grapple

Tether
- Increased centripetal force from 60 to 95 when pawn is going away from
center
-- done to counterbalance the increased gravity slingshot
-- also makes tether to maintain length better.