Flow API from parsing into Inspect2

Flow from parsing a fvec into new Inspect2 class.
Still missing the Inspect2 toHTML.
Merge branch 'master' of github.com:0xdata/h2o
missing cast
mnist_to_csv.py will create the mnist_training.csv.gz and mnist_testing_csv.gz from the source pixel images.
test_GLM_mnist.py updated.

test_dead_node_status.py fails after killing a node. there's not enough status in the cloud status to see that a node has gone ito red-state
(unless the "last_contact" key i sparsed somehow)
Fix collision with .gitignore.
Merge branch 'master' of https://github.com/0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' into fourier-6