K-D tree properly handle duplicates now.
in-place matrix rotation added (by 90 degrees)
jdk-8 parallelSetAll() added for random array generator.
groovy nature added
Merge branch 'master' of https://github.com/mstepan/incubator.git

Conflicts:
	algorithms/src/main/java/com/max/algs/ds/tree/geometry/KDTree.java
	algorithms/src/test/java/com/max/algs/ds/tree/geometry/KDTreeTest.java