COnfusion matrix improvement
 - alignment of model and data classes for enum predictors and integer
   predictors
 - basic test cases
Model v. validation data - classes alignment integrated into UI.
Shortcut to use dataset for scoring with help of RF.
Test added into junit.py
Improvements in RF view:
 - hidden oobee option
 - number of trees is checked and respect number of trees stored in
   model
Minor UI fix in upload page.
UI fix.
Temporary RF refactoring commit.
A dedicated RFscore page. Serves as a "redirect" to RFView
Blocking on future returned by DRF corrected.
 - now it blocks correctly for all nodes to finish their DRF round
 - jobs partially refactored. Waiting for new Jobs API
No more active waiting in tests !!!
Minor refactoring in RF API.
Jobs progress disable for now - waiting for new Jobs API.
Unnecessary cast removed.
Minor clean-up.
Merge branch 'master' of github.com:0xdata/h2o