Updated Context Processor and Custom Tags

* Updated Context processor to pass if the user is authenticated to the
  context. This is so the {% secure_file %} tag will not display anything
  if the user is not authenticated
* Updated the custom simple tag {% secure_file %} to render both the html
  needed to render an image and also check if user.is_authenticated(). Will
  need to edit this some more to take css classes.

TODO:

* Move SECURE_ROOT variable to settings.py
* Create the wedding pictures app
	- This needs a complete redesign from the previous version
	- Need to thumbnailize the wedding pics
	- Need to create a thunmbnail viewer with pagination
	- Need to upload the wedding pics to the secure file location
	- Add ability to comment on a photo
* Finish the Forum app
	- This has core functionality but I need to improve the UI
	- Make sure the users are logged for each of their posts
* Add users
	- Only I can access the apps. Make it so family can