Fix jenkins + linpack + bigmachine bug

Launching 5-nodes for multinode testing; all 5 on a big machine
immediately attempt to run a linpack; this takes about 18-20secs - and
happens before a cloud forms.  Thus the first few tests timeout for
cloudsize being too small.
Use model's run_time to determine training speed during toHTML in multi-node
operation.  This prevents the displayed training speed from dropping in-between
model updates (time advances but #training samples doesn't).
Cosmetics: Refactor code for ADADELTA for bias.
Apply L1/L2 penalty to bias values as well.
Update DL R Vignette wrt input dropout and L1/L2 penalty.
Change default values for ADADELTA hyperparameters to 1e-8/0.99.
Change default activation function to Rectifier.
Use Rectifier without Dropout for DL_imbalance_large RUnit test.
Merge branch 'master' of https://github.com/0xdata/h2o
increase some timeouts
Merge branch 'master' of github.com:0xdata/h2o
Upgrade emacs
added demo for variable importance
Tweak dataset name for VI example.
Copy relevant portion as dontrun into each algo.
hardwire the test to do kmeans with the seed that failed
it will get this error
AssertionError: 0,0,0!=16.7520976159,16.7986444476,16.7156939381. Sorted cluster center 0 x not correct.

with another seed, it gets all the right centers.
the data is well seperated dense spheres of points (basketballs)

ideally, kmeans always finds the centers. It does for a lot of seeds
The hardwired bad seed is
5010213207974401134

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Merge branch 'master' of github.com:0xdata/h2o
I don't see why a 10k row by 10k col of libsvm should take more than 60 secs, but I increased it to 120 secs since jenkins was failing.
I added normalize=0 to the kmeans bad_inits test but it still fails

I ran the 10k x 10k parse case on my machine and the time including summary was 20 secs

poll 1.0 http://192.168.0.34:54321/2/Progress2.json?job_key=%240301c0a8002232d4ffffffff%24_b7b89d92c0607c9ad49442f33bc7471d&destination_key=cL
[2014-09-02 20:37:22.928197] summary_page parameters: {'max_qbins': None, 'source': u'cL', 'cols': None, 'max_ncols': 10001}

B Trial # 2 rowCount: 10000 colCount: 10000 parse end on  syn_6814402659323599006_10000x10000.csv took 20.0690009594 seconds

sandbox/syn_datasets/syn_6814402659323599006_10000x10000.csv numCols: 10001, numRows: 10000, byteSize: 37604572
fix speedrf space needed computation
Merge branches 'master' and 'master' of github.com:0xdata/h2o
increased max_iter to 50 and added a check for it hitting the limit (iterations stop at 49 if max_iter=50)

test now gets
Exception: ('KMeans unexpectedly took %s iterations..which was the full amount allowed by max_iter %s', (49, 50))

which I think is related to why it doesn't get to the right center with this seed.