I'm currently not keeping track of my changes, so I apologize for an incomplete changelog.

~ Disabled half-lambert for many materials using phong.
~ Enabled $halflambert for some transparent materials.
~ Reworked myplastic and mywindow using a fake PBR method.
~ Updated a few outdated materials using $envmap to use the new phong method.
~ Optimized the file size of many materials.