Initial login and author contacts backend and frontend functionality.

Other refactors/additions that should have been in previous smaller
commits, as well.
Basic and ugly public index of listing tags.
Fixed public tag rendering. Added sorting with ease. Jinja rocks.
Implementation of public listing navigation.
Added ugly logout to author controls.
Added functionality for About Me and fixed fetching the listing.
Adding hardcoded Google map stub.
Fixed error where listing contact was not being synched on create.
Adding listing name editability.
Adding tag editing and other refactors.
Adding dataTables to category pages.
Added support for slashes in tags/slugs.
Removing map stubs.
Added addresses to listings.
Mega-commit. Styling and controller refactors.
Merge pull request #14 from rolsen/alpha_p0

Alpha p0