grafx - Extensible Java Graphics Package Code

In Donut, collapsing m_verts to a one-dimensional array. This is paving the
way for all sorts of performance improvements; or rather, it's paving the way
to having the test code use the code optimally, so that we can test performance
since this is the only code that really tests the code at this point.

Adding a second transform() function to Matrices, which takes offsets.

Adding POLY_INTEGER_VERTEX option to Donut.

Renaming class com.nerius.grafx.d3.demo.MatrixUtils to
com.nerius.grafx.d3.math.Matrices, and making it publicly accessible.

Renaming class com.nerius.grafx.d3.demo.VectorUtils to be
com.nerius.grafx.d3.math.Vectors, and making it publicly visible.

Starting to fill out Javadoc in BatchModeDepthGraphics.

Changing the order of things defined in DepthGraphics interface.

Adding BatchModeDepthGraphics. This is just the beginning.

Implementing getClip() in TiledDepthGraphics. This is done very elegantly by
taking a union() of all the clip rectangles.

Making some progress on the tiled rendering.