Changes to url
Merge branch 'develop' into feature/Reserves

# By Colin Murtaugh (12) and Parker, Eric P (4)
# Via Colin Murtaugh (3) and Parker, Eric P (2)
* develop:
  added a new lti_auth_error view
  include icommons_ui in the installed apps
  added gunicorn config for qa
  add an /lti prefix to the urls to make it easier to set up in apache/nginx
  added gunicorn to the qa and prod reqs
  temporarily switch the “secure” url to be http so that it works in development.
  added the LTI middleware back in; it does need to be present in order for the LTI request to be processed correctly
  fixed github url
  added a secure.py.example file, modified gitignore to allow it
  stubbed out the add_user tool
  stubbed out the add_user tool
  using video detail page instead of inline video player
  using video detail page instead of inline video player
  load icommons_common and icommons_ui from GitHub instead of HUIT git
  added sort by date and search box
  removed dvs url
changed project url prefix from lti to lti_tools