Remove pick handling
Merge pull request #292 from virtual-world-framework/performance

Remove pick handling
Just changing capitalization in file names.  Windows doesn't care,
but Linux does (and our development server is Linux).

Checking directly into mars-game-staging because I'm lazy and this change is trivial.
Add pull in for camera when colliding with the environment
Add placeholder lower zoom bounds for camera pull in
Change camera pull to be based on grid bounds instead of raycast
Restrict camera in third person based on grid bounds and tile values