initial support for refresh
overhaul of the load scripts
minor bugfixes for refresh
corrected table list which should be refreshed
corrected changed script filename
Merge branch 'master' of https://github.com/intel-hadoop/Big-Bench
added missing file existence check
Update README.md
clean data/metastore before running the generate/population modules
updated driver to perform the refresh as well as output more info messages
merged files
merged BigInSight changes
fixed small problem in hadoopDataGen, added data generator version with refresh fixes, re-added driver with refresh support
added new pdgf version with some generation documentation, removed needless whitespace in setEnvVars