timeoutSecs increased
oobee -> 1
Unify DTree regression & classification

DTree predicts a small float-vector, which could be residuals, a
regression or a class (e.g. RF).
GBM trees predict residuals instead of classes.
DRF trees predict classes.
Pass in response vector as a separate arg instead of last vec in a
Frame.
NewChunk more flexible about at/at8
Add float-array add()
Cleanup GBMTest - test same 3 datasets on both RF & GBM
fixing k-means args, c.f. HEX-705
oobee 1 -> test fail; switch to 0
time.sleep(3600) -> #
add individual machine configs for new machines

Conflicts:

	py/testdir_0xdata_only/test_four_billion_rows.py
didn't follow naming convention
Bugfix in the VAParser. Fixed integer overflow issues with #rows.