Added strong rules to glm2.
Updated strong rules (correct expansion of beta between different lambdas (with different number of active cols).
few bug fixes in glm2 strong rules
Fixed line-search with strong-rules. Potential AIOB when comparing betas of different sizes. Added explicit expansion to full size beta (for now) when comparing gradients/betas in line-search.
Strong rules update.
Merge branch 'master' into glm_strong_rules

Conflicts:
	src/main/java/hex/FrameTask.java
	src/main/java/hex/glm/GLM2.java
GLM2 strong rules. Few fixes after merge with master.
strong rules update.
cleaned up toc and indexing on docs
Merge branch 'master' of https://github.com/0xdata/h2o
Fix PUB-645: Accept grid search over integer arrays without fussing in UI.
Fix grid search display of array of doubles.
Merge branch 'master' of https://github.com/0xdata/h2o
Add ability to set a seed in Exec2 runif. If seed = -1, then the current system time in milliseconds will be used.
Add documention for best_model_key.
Clean up debugging code.
Merge branch 'master' of https://github.com/0xdata/h2o
edits to layout and basic content
iiMerge branch 'master' of https://github.com/0xdata/h2o
passes