Implemented TRK loader and bump mapping

Got the track to load in tangents and implement bump mapping with the
texture.
Alpha Transparency and Depth Function added

Not currently used, but if we wanted to utilize these functions in the
future they are created.
Added specific depth control functions

Added turnDepthTestOff() and turnDepthTestOn() functions
Removed track.obj

Changed it so that the track.trk file is present only (aka removed
track.obj)
Added Ecoli Animation

Implemented an animation for Ecoli.
support setting rotations
merged master into branch
Merge pull request #24 from 5-second-rule/TubeBump

Tube bump merged