Remove unused imports
Restrict when entity is shown like we do for blocks.

X coordinate is showing as reversed in XY mode -- try to fix
Change to mouse-drag selection
Change default block selection to something close to 3d engine:default

Remove old selection code
Clean up some mouse interaction under awt
Only show block selection when it exactly matches current view axis coordinate
Fix offset problem with translating between world coords and screen location

Clean up dead and unused code
Now translate screen location into float world coordinates
Update AwtCanvasRenderer to work with engine - f817722
Update to comply with latest version of engine
Update to conform with engine