Polygon: fixing compilation issues.

[SVN r86003]
Polygon: fixing msvc warnings.

[SVN r86008]
Polygon: rerunning benchmarks; updating benchmark documentation pages.

[SVN r86189]
Polygon: correcting glitches in the documentation.

[SVN r86190]
Polygon: fixing (site, circle), (circle, circle) comparison logic.


[SVN r86222]