Modified Rendering Code

Additions:
- TmtTesselator.java: Vanilla Tessellator modified to expose the OpenGL
Q texture coordinate
- PositionTextureVertex.java: Vanilla PositionTextureVertex extension
modified to allow the Q coordinate to be stored with the vertex, removes
requirement for a base class modification

Changes:
- ModelPoolEntryObj.java: Utilizes the new PositionTextureVertex object
- ModelRendererTurbo.java: Adds Q coordinate calculations to trapezoids
(other non-rectangular shapes can be done later), adds Q coordinates to
the PositionTextureVertex's created by the addPolygonReturn function
- PositionTransformVertex.java: Utilizes the new PositionTextureVertex
object
- TextureGroup.java: Replaced TexturedQuad with TexturedPolygon in order
to remove requirement for a base class modification
- TexturedPolygon.java: No longer extends TexturedQuad to remove
requirement for a base class modification, utilizes the new
PositionTextureVertex object, utilizes the new TmtTessellator for
rendering

Hopefully this code will fit with the current style (tabs not spaces,
etc.) If you find a bug, i will try to recreate it and debug it. Also I
plan on adding the Q coordinates to some other non-rectangular shapes