Removed spaces before and after the #

If a file is .png, sets alpha transparency

Added changes to automatically convert from a right to left handed
coordinate system.  Maya is right, Babylon.js is left.
Added DeltaKosh's command line flag /rl, and used flag to control whether
or not the Right->Left coordinate transformation took place.
Merge pull request #115 from professorf/master

Changes for Right-Left Coordinate Systems & Prefixed Mesh Parts with Mesh Name