Add view_all permissions for talks.
Add permission for viewing all talks and clean-up talk permissions.
Add basic tests for permissions around displaying and updating talks.
Add talks.view_all_talks permission to talk mentors group.
Merge pull request #77 from CTPUG/add-view-unaccepted-talk-permissions

Add view unaccepted talk permissions.
Merge remote-tracking branch 'master/master' into py3
Updated classifiers to be complete
Updated installation docs for Django 1.6 and south
Remove extraneous print() in tests