Added Grid
Added method reset() to spatialManager
Fixed minor AI bug
Visual easing of the player between vertices

Also, some changes to the framwork: The last user input at the vertex is
used to determine the x and y velocity of the player as well as the
destination vertex.
Merge branch 'collision' of github.com:kreldjarn/TRON

Conflicts:
	scripts/spatialManager.js
merge
Generalised player visual movement to take its timestep into acct