testing menus w DummyCache configured as default LocMem does not appear to be working as intended with django-sitetree
Switching to LocMemCache with a defined LOCATION
revert to dummy cache setting as LocMem with pinned Location does not work, modify tests to work under any cache
removing unneeded custom post save signal
Fixed #256, ensures abstract converts markdown
Merge pull request #258 from PyCon/256-presentation-markdown

Fixed #256, ensures abstract converts markdown
Merge branch 'staging' into develop