WIP refactor of current_month acquisition
Split in multiple tests get_calendar_entries
Correctly pass year and month parameters
Month or day in context must be date objects, according to the view
Review tests for calendar
Fix the get_calendar_entries templatetag
Python 3 fix for map
Fix case where timezones are not enabled
Merge branch 'feature/fix-calendar-on-entry-detail' into develop

Conflicts:
	zinnia/templatetags/zinnia_tags.py