Implemented a catch all error for 403 (forbidden), 404 (not found) and 500 (server error). These can be provoke using App::abort(404);
Fix error when venture not found and when trying to edit page when not team leader
Merge branch 'master' of https://github.com/bahit/FacultyCooperative

# By sthomag
# Via sthomag
* 'master' of https://github.com/bahit/FacultyCooperative:
  a few faqs
  Still only 14 pages as appendix doesn't count in page counts