Various changes.

* Filesystem-based storage is removed.
* Support for Redis-backed storage is added.
* Storage classes and JSON functions are re-worked.
* Login sessions support is moved into ``tornadokick.web``.
``tornadokick.cms`` is removed.
* Support for configuration file to be specified via command-line is added.
* Custom JSON libraries can now be specified for ``write_json`` method to use.
* Multiple static directories support via ``tornadokick.web.Application`` is removed.
Merge branch 'development' of github.com:multoncore/tornadokick into development

Conflicts:
	tornadokick/storage.py