initial checkin to release branch for polygon

[SVN r63192]
restoring images lost during copy from trunk

[SVN r63213]
restoring lost file

[SVN r63214]
removing bad file

[SVN r63243]
fixing colinear and duplicate points in hole fracturing of 45-degree polygons

[SVN r63251]
cleanup of html

[SVN r63253]
merge from trunk

[SVN r66485]
merge from trunk

[SVN r66486]
merge from trunk

[SVN r66487]
missing header

[SVN r66493]
fixed trac 4868 polygon concept contains function

[SVN r66903]
fixed win32 macro usage

[SVN r66904]
disabled 45-degree booleans optimization

[SVN r69615]
removed reference to 45-degree booleans optimization

[SVN r69617]
fixed snap to 45 and general contains bugs

[SVN r70495]
updated unit test

[SVN r70543]
added simplify algorithm

[SVN r70725]
added simplify algorithm

[SVN r70726]
added simplify algorithm documentation

[SVN r70727]
Polygon: merge from trunk. New functionality: Voronoi diagram, segment concept, segment utils.



[SVN r80546]