Issue: Redirect DM

Redirects should be saved separately from a normal article since redirects don't really have their own content. Saving them as pages creates a number of unnecessary database entries and difficulty identifying them as redirects at a database level without doing expensive joins. Saving them as their own content type via a DM would be ideal. This also would allow them to redirect to other content types as well, without the cumbersome output handling from VaultWiki 3. Removing redirects from page code will also speed up page parsing.

Completed for 4.0.0 Alpha 1.