Lighting Fix, Tile Animations, Movement Improvements

1) Tiles animate when moved. A) When moved between turfs. B) When moved
out of a hotbar onto a turf. C) When moved from a hotbar onto a turf.

2) Different lighting systems for Web client vs DS, as the Web client
can't handle BLEND_SUBTRACT.

3) Users can now click in areas outside their view to move into those
areas. (Added abackground underlay that accepts clicks).