Added Wedding app and some minor other tweaks

Minor Tweaks:
* Added CSS (gallery.css) to display thumbnails for wedding pictures
* There are some changes in the basefunctions/views.py that were to test the
  {{next}} feature for logins. This is NOT done, only comments have been added
  for tests
* LOGIN_URL in settings set to /login

Wedding App
* Started the app
* Started the gallery template
* Added root and gallery to urls
* Added a model for each picture and the model admin