Add is_current to member api response
Rename member api filter: current_knesset => knesset
oknesset_update wget timestamp and requirment fix

Changed wget command to not fetch if the db wasn't updated.
Also fixed mis-pasted path of requirements file.
Update main page about and what can be done
More events in index page
Merge branch 'master' of https://github.com/yoniYalovitsky/Open-Knesset
freeze_bills management command
Hightlight frozen bills
Added scraping for polyorg Parties, admin interface and membership options for polyorg party (as requested by Ofri)