Adding getGeometryType function for Polygon type

Easy fix for https://github.com/bjornharrtell/jsts/issues/104
Merge pull request #141 from igrcic/master

Adding getGeometryType function for Polygon type
Merge branch 'master' of https://github.com/kolosov-sergey/jsts into kolosov-sergey-master
Add missing this. prefix
Fix and testcase for converting OL geometrycollection to JSTS (#144)
Port of SimpleMCSweepLineIntersector and supporting classes, for improved noding performance
Use latest OL, upgrade Jasmine and javascript.util
Bump version to 0.13.3 and build release
almost positive this fixes a bug, did not test