a
Merge branch 'matteo-docs' into develop

We already did it in master.
merge master and fix paths for sampler
yuke compression
yuke
insert
no crazy rm rf
conflict
Merge branch 'develop' of github.com:HazyResearch/deepdive into develop
fix rm
Merge branch 'develop' of github.com:HazyResearch/deepdive into develop
If inference.parallel_grounding is true but one of the gpfdist variables is not, throw an exception.
Fix English
Add comment
merge fix from master
comment out useless code until we find out what to do about cleaning the directory
Add helper function to execute a bash script
rename data loader
Add build sql cmd helper function
throw exception when gphost etc are not set. A bit of refactoring