Add example test
Updated plpy extractor to support groupby; changing semantics: return tuples of arrays (x[], y[])
Merge branch 'develop' of github.com:HazyResearch/deepdive into develop
Updated spouse example for new plpy_extractor format
add explain sql support
Merge branch 'develop' of github.com:HazyResearch/deepdive into develop
Fix bugs in plpy compiler: nested queries; indents in init function
Merge branch 'develop' into feiran_grounding1
print original query before explain
Merge remote branch 'feiran/grounding1' into feiran_grounding1
Updated OCR examples with better format
Increasing inference timeout from 24 to 200 hours
Increasing extractor timeouts from 24h to 200h
Added spouse example with 1 tsv_extractor inside
Supported new type of extractors to get rid of JSON&Scala: tsv_extractor
Comments about using gpload for tsv_extractor
Forgot to remove uncommented code...
Fixed tests: not to continue when extractors fail
Skip inference if no factors are active
Changed tsv_extractor parallelism as what user specified