Clean up JavaDocs.
Add generateHTML() test to JUnit for DeepLearning.
Only ask for Job status if Job is in DKV.
Add JUnit test coverage for HTML page creation for GLM2.
Add JUnit test coverage for toHTML for DRF and GBM (and check for _dataKey NPE in toHTML).
Add JUnit test coverage for toHTML for KMeans2.
Add JUnit test coverage for toHTML for PCA (and prevent NPE).