Improved EarClipping algorithm concerning polygons with vertices having the same x or y component.
Fix: warning concerning points size
Merge pull request #312 from nizar-sallem/fix_warning

Fix: warning concerning points size
Update documentation

- Replace svn by git/Github.
- Update links.
- Tutorial versions.
Merge pull request #130 from magro11/master

EarClipping algorithm improved + typing error in Clipper3D