Modified Gravity Toggle & Character overhead name colors

Character's names now display with their team color.
Modified the toggle gravity ability, so that it now applies movement
while gravity is off as a force, rather than a direct movement.
Fixed collision issue with the Area Push Ability by changing the
collider to a squished sphere, rather than a full sphere.  This required
the importing of a squished sphere mesh, with generated colliders.
Unity doesn't support the scaling of colliders.