Merge pull request #8 from Martichoras/master

merge-pull req
Added wall-call function

Wall-call will take x,z coordinates from function call, and return the
value from the array.
Fixed script + textures + layout

added bump-map to objects, added functions to levelGenerator scripts &
improved layout
added textures for testing

coal 1 + 2
Merge remote-tracking branch 'origin/ISS6' into ISS5