applied to python api and exotic.c, removed some args being passed down which were not needed.
keyword args for new mathutils types were being ignored when they should raise an error.
- replaced PySys_GetObject("modules") with PyImport_GetModuleDict()
- use defaults for keymap import/export rather then setting the same value every time from the UI scripts.
- 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.
