-- Added Extract(...) for streaming articles from Pubmed, extracting
knowledge from them and producing a Gexf file.

Signed-off-by: Mark Farrell<m4farrel@csclub.uwaterloo.ca>
Merge branch 'master' of github.com:crea-berkeley/knowledge-extraction

Conflicts:
	src/main/scala/crea/nlp/Pubmed.scala
Merge branch 'master' of github.com:crea-berkeley/knowledge-extraction
-- Added timestamp column for CSV files.

Signed-off-by: Mark Farrell <m4farrel@csclub.uwaterloo.ca>
Merge branch 'master' of github.com:crea-berkeley/knowledge-extraction
-- Mine PubMed for several terms at once provided by a source, i.e.
terms.txt.

Signed-off-by: Mark Farrell <m4farrel@csclub.uwaterloo.ca>
Merge branch 'master' of github.com:crea-berkeley/knowledge-extraction

Signed-off-by: Mark Farrell <m4farrel@csclub.uwaterloo.ca>

Conflicts:
	src/main/scala/crea/nlp/Pubmed.scala