WIP PCA in FluidVecs
WIP PCA and PCA scoring on FluidVecs
Renaming a few internal methods, no behavioral changes
WIP PCA scoring functions with ValueArray PCA only
Automatically flip row to NA in PCA score if input contains NA
Deal with NAs in PCA scoring
Merge branch 'master' of https://github.com/0xdata/h2o into anqi-pca2

Conflicts:
	R/h2oRClient-package/R/Algorithms.R
	src/main/java/water/api/RequestServer.java
Merge branch 'anqi-pca2' of https://github.com/0xdata/h2o into anqi-pca2

Conflicts:
	src/main/java/hex/PCAScoreTask.java
Work in progress on PCA
Updated GramTask to apply normalization by number of observations (not-counting rows with NAs).
Updating all the peripheries depending on PCA
Updated GramTask to apply normalization by number of observations (not-counting rows with NAs).
Merge branch 'anqi-pca2'

Conflicts:
	R/h2oRClient-package/R/Algorithms.R
Merge branch 'master' of https://github.com/0xdata/h2o