Added entity to the group by field list
Removing unused "reserve" import
PEP8 membership export management command
Refactoring and updating styles on membership export page
Export memberships by membership type
Reorder entity for import.
Taking Entity off of the BaseManager since it doesn't use the BaseModel.
Force a width and height on the tendenci logo.
Event speaker photos are more robust with multiple files

Previously you could not upload an event speaker photo with the same name multiple times.  Only one version of the speaker file could exist.
Added Facebook like tendenci code to photo set view and individual photo detail view.
Merge pull request #321 from bpotterschipul/modify-photos

Added Facebook like tendenci code to photo set view and individual photo...
Defaulting event registration price to 0 if price field is not available
Updating invoice creation for forms.
Membership preview defaults to users customer var else request-user var
Removing custom bulk delete option.
#194 #195: Updated list_event, added list_corporate_memberships

Conflicts:
	tendenci/addons/corporate_memberships/templatetags/corporate_memberships_tags.py
#195: Updated start_dt filter in order if-clause

Conflicts:
	tendenci/addons/events/templatetags/event_tags.py
PEP8 changes for events_tags
Added docs for start_dt option in event_tags
Remove non-standard quick-options.