Added history charts for straw votes in proposal detail page. various small fixes and additions
Merge remote-tracking branch 'yaniv/master'

Conflicts:
	src/communities/locale/he/LC_MESSAGES/django.mo
	src/communities/locale/he/LC_MESSAGES/django.po
	src/issues/templatetags/voting_tags.py
added a condition when summing straw votes
Some trello issues.
css, form labels, translations.