master: Updated subdivision return objects to interfaces rather than explicit classes. Added other basic algorithms.
Merge remote-tracking branch 'upstream/master'
merge test
Conflicts:
	src/main/java/hillman/algorithms/subdivision/catmull_clark/CatmullClarkUtils.java
	src/main/java/hillman/algorithms/subdivision/root_three/RootThree.java
	src/main/java/hillman/algorithms/subdivision/root_three/RootThreeUtilities.java