Log Message:
Update to 1.6.4:

Overview of changes from pycairo 1.4.0 to pycairo 1.6.4
========================================================
General changes:
    Pycairo 1.6.4 requires cairo 1.6.4 (or later).
                  requires Python 2.5 (or later).

Bug fixes:
    16112: Fix win32 'python setup.py ...' build -- use double quotes

New Methods:
    Context.has_current_point
    Context.path_extents
    ImageSurface.format_stride_for_width
    PSSurface.get_eps
    PSSurface.set_eps
    PSSurface.ps_level_to_string
    PSSurface.restrict_to_level
    Surface.copy_page
    Surface.show_page

New Constants:
    cairo.PS_LEVEL_2, cairo.PS_LEVEL_3

Other changes:
    test/pygame-test1.py, test/pygame-test2.py : pygame tests

    examples/cairo_snippets/snippets/ellipse.py : Update
    so line-width is a constant width in device-space not user-space