Updated model to add event.status and event.embargo
Updated form to include event.status
Updated queryset to select only published talks
Removed unnnecessary import
Merge branch 'master' into issue-59

* master: (21 commits)
  #92 default start and end date in EventFactory
  Update Django to 1.7.1
  Pagination: "wrong" value for page parameter to redirect to list
  Provide filters using date and time
  Fix issue when a textfield has some choices
  Refactoring audit trail view, try to make it less confusing
  fixed issues with datetpicker tests
  Added README
  Simplify condition
  Attempt to clarify the test -- still not passing..
  Corrected style
  Tests passing with first field -- still failing at the second datetimepicker
  Updated form to filter revisions per date
  Fixed pattern for details of a revision
  Fix use of appuser -- replaced by email address for now
  identify user of the revision by its email address
  Event: start and end time should be mandatory #92 -- functional tests are not passing atm
  Initial audit trail application imported
  Use reversion middleware for now (if we need to attach meta that will not be possible anymore)
  Register events models to reversion
  ...

Conflicts:
	talks/events/models.py
	talks/events/tests.py
set full name of statuses rather than abbreviation
Use event factory in tests
Update Event model manager to only get published events
Merge branch 'master' into issue-59

* master:
  Replaced model field by property to get HTML version of textile content
  #93 Textile syntax

Conflicts:
	talks/events/forms.py
Merge pull request #97 from ox-it/issue-59

Issue 59: adding event status
merge master to issue-80