python - be: Add path accessors.

Log Message:
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Add path accessors.

Sequence interface and center, area, and points properties.

Modified Files:
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be/src/type:
geometric.c (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/geometric.c.diff?r1=1.6&r2=1.7)