Minor speedup, use floats instead of doubles in arithmetic expressions.
Clean up API for HitRatio, use Func instead of Request2.
Clean up calcError method.
 1) Always expect pointers for CM, AUC or HitRatio to be populated
 2) If AUC and CM are given, then compute AUC and use its CM to fill the passed-in CM
 3) Remove DeepLearning-specific stuff, allow outsourcing to Model.java
Merge branch 'master' of https://github.com/0xdata/h2o
Clean up calcError logic.
Print CM errors to 5 digits precision.
Refactor calcError from DLModel to Model.
Merge branch 'master' of https://github.com/0xdata/h2o