use skip_till_key as offset when using multiple threads in postgres_sqlalchemy_move
Merge branch 'master' into postgres
only include digits in year field in biblio
store year as string
import re
add skip_if_exists to create_objects_from_item_doc for use in migration script
get item and collection from postgres
remove extra prints
remove extra printing
add Flask-DebugToolbar.  setenv FLASK_DEBUG=True to use it.

also updated the versions of a few libraries, added encoding to every response, centralize mimetype setting
add solo indices to cid and tiid columns and make joins be by subquery
work on item_missing_biblios_on_a_page
work on item_missing_biblios_on_a_page
only bother if there is title in the biblio
Merge branch 'master' into postgres

Conflicts:
	extras/db_housekeeping/postgres_sqlalchemy_move.py
don't include column names in gets
add debugging messages on json loads
work on item update
biblio doesn't mean genre article
catch mendeley year error