Merge pull request #87 from Mirosta/master

Plane bullet direction fix + Sound overwrite fix
Update to MCP 7.26a mappings
Merge pull request #89 from agaricusb/update-mcp726a

Update to MCP 7.26a mappings
Removed custom texture overlay class
Removed sprite overrides
Updated GUI methods
Various fixes
Hacky fix for sprites
Fixed recipe adding
More icon / recipe fixes
Split sprite sheets up
Various things
Gun box textures done
Block texture fixes
Array index error fix
Added new methods in Driveable Data. Need to check purpose of these
Fixed calls to setBlockWithNotify
Fixed more calls to setBlockWithNotify
Removed calls to setIconIndex
Removed unnecessarriarity (totally a word)