[#570] Update django-counter requirement

django-counter needed patching to be compatible with Django 1.5+.
This fix refers to the patched version in the pip requirements.
Merge pull request #576 from akvo/feature/du570_upgrade_python_libs

[#570] Update django-counter requirement
[#243] Removed location option for project updates
[#572] Merge branch 'feature/django-upgrade' into feature/du572_markdown

Conflicts:
	akvo/templates/partner_sites/project/update_main.html
	akvo/templates/rsr/project/project_update.html