fix http500 in /vote/tag/ when passing garbage in member GET param (for some reason googlebot does that)
Merge branch 'master' of github.com:hasadna/Open-Knesset

Conflicts:
	laws/views.py
correctly filter meetings list in committee 'all meetings' page. closes #147
Merge branch 'master' of github.com:hasadna/Open-Knesset