reduce comments
some tests that were in my dir..maybe prune later. added cars.csv to summary2_unifiles.py
some other stuff laying around. may need to tweak
Merge branch 'master' of github.com:0xdata/h2o

Conflicts:
	py/testdir_single_jvm/test_summary2_unifiles.py
	src/main/java/hex/Summary2.java
in progress