Revert "Merge branch 'customMapUnits'" so this branch has only changes necessary for a custom JTS geometryFactory

This reverts commit 2e4cfd6699d4393fbe49b9ebaae442eb01257a64, reversing
changes made to 77854262681f9e1b085ebc1bbe3a9179c2c1fe5f.

branch customMapUnits and nullJTSgeometry reverted
Conflicts in jts/src/test/java/com/github/filosganga/geogson/jts/JtsAdapterFactoryTest.java resolved