Merge pull request #1 from tobias-engelmann/darkside

Merged darkside into master
create and delete for series
mail accounts available as json
changed forms to generic
added json responses
added view for calendar share
fixed calshare form
fixed calshare form
renaming
next step in calendar frontend
Merge branch 'devel-backend' into devel-frontend

Conflicts:
	src/cal/views.py
calendar nearly finished - permission share broken
fixed issue with series appointments
fixed issue with calendar share form
series / appointments improved
fixed error in appointments view
fixed error in appointments view
fixed error in appointments view
added series and appointment forms
Merge branch 'devel-backend' of github.com:tobias-engelmann/ProjectCM into devel-backend