- multiplying a 2D vector by a 3x3 or 4x4 matrix would use un-initialized memory, now throw an exception.
- use more variable length array BLI_math functions.
own fault when adding mathutils callbacks, generic destructor didnt free the matrix accessor array, made the array apart of the matrix struct since its not worth malloc'ing to save at most 16bytes.
- added new mathutils.Color() type, use with rna so we can do for eg:
material.diffuse_color.r = 1.0
# also has hsv access
material.diffuse_color.s = 0.6
- made Mathutils and Geometry module names lowercase.
