app.nlp.parse: Removing DepParser1, renaming DepParser2 to DepParser1
app.nlp.coref: Removing WithinDocCoref1, renaming WithinDocCoref2 to WithinDocCoref1
app.nlp.parse: renaming
nlp: merging the pull request which deletes parser1 and coref1
changing a few stray DepParser2 references in comments and in the QSubExecutor for the parser trainer