Added flag to GLM2/Frame task to allow to keep all factor levels in (default is to  skip the level-0).
Merge branch 'master' of github.com:0xdata/h2o

Conflicts:
	src/main/java/hex/glm/GLM2.java
Fix in PCA/Frame task, had mixed up flags after adding runAllFactorLevels flag to FrameTask.
Merge branch 'master' of github.com:0xdata/h2o
Missing changes from my previous commit.
Merge branch 'master' of github.com:0xdata/h2o