Trashed Pre-Alpha 0.38

-New Structure: Bridge - build across! (very prototype version)
-New Structure: Power Inverter - speed up and power up other structures
-Improved performance on lots of garbage
-Fixed Grinder arrows on build view
-Fixed snakes in cave
-Made cave a little bigger
-Fixed bulldozer getting stuck in the garage
-Improved visibility of scanner screen
-Increase the mouse look angle