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.
strong rules update.
PP-57: add a hash to Vecs and Frames and use them in the UniqueId for a Frame.
fix placement of validation in remoteSend list for randomForest.FV
fix placement of validation kw in randomForest.FV
another flaky R failure fixed
add multinomial correctness tests
add missing ending div, so warning doesn't extend
check each class for significant differences in error
add check for Predict.R file (some tests don't have this phase)
match speedrf inputs/outputs to DRF
update speedrf mnist test to do simpleCheck now that params are unified
update R SpeeDRF to match  new api