reinstate gunicorn in requirements.txt, because it's included in INSTALLED_APPS
Merge branch 'wagtail0.5'
Merge branch 'develop'

Conflicts:
	django-verdant/requirements.txt
added blank=True to various models that had had this erroneously removed
Merge branch 'develop'
fixed more balnk=Trues
Merge branch 'develop'
enabling closure of events listing from page settings
added migration for standardpage
migrations for other target content types
tweaks to default collapse logic
changed footer links for ticket #169
passed sidebar behaviour setting to sidebar of more templates
Merge remote-tracking branch 'origin/feature/618-events-listing-closed' into develop
minor rewording in footer
Merge branch 'develop' into feature/OnlineExpressForm