ENH: Revamp mmm fixture import code

- Old fuzzy matching code was throwing away ~75% of the matches
  included in the file. expunged.
- Now relies on entity_id field already included in the fixture,
  providing 6x more matches, relying on a faster and more accurate
  algo.
- Much faster import process with @transaction.commit_manually
- Uses a single JSON fixture file.
- Added retrieval_date and schema_version to fixture file.
- Data lives at:
	https://github.com/y-p/mmm_scrape/blob/master/results/mmm.json
  occasionally updated.
- Moved test fixture file to "testdata/mmm".
- Placed gzipped fixture in "data/".
- Reworked tests to accommodate changes. less moving parts now.
- Closes the long-ignored #3303.
Knesset model and initial data
Knesset 18 parties
Merge branch 'feature/mmm_import_improvements' of https://github.com/y-p/Open-Knesset
Adjust agendas_for, closes #3911
Show Member's age in years, closes #3932
Fix Party links icons
Adjust editprofile.html, also responsive friendly
Adjust avatar change page
Adjust profile_list.html
Bootstrap public_profile.html
Bootstrap annotated_items.html
Show thumbs icon on tagged items in public_profile
Bootstrap for user/tagged_items.html
Merge branch 'master' of github.com:hasadna/Open-Knesset
Make parsing better for knesset 19. Get factions for each MK, and use them to assign the MKs to their factions. Show only current MK pages, since we don't have a design for past MKs yet