Added support for grid search to glm2.
Merge branch 'master' of github.com:0xdata/h2o

Conflicts:
	src/main/java/hex/FrameTask.java
	src/main/java/hex/glm/GLM2.java
	src/main/java/hex/glm/GLMTask.java
	src/main/java/hex/gram/Gram.java
	src/main/java/hex/pca/PCA.java
	src/main/java/water/Request2.java
	src/main/java/water/api/Progress2.java
Merge branch 'master' of github.com:0xdata/h2o
Merge branch 'master' of github.com:0xdata/h2o
changed JobCancellation exception in DGLM to point to the one in GLM2.
updated PCA to work with my updates to FrameTask.
Merge branch 'master' of github.com:0xdata/h2o