Fixed a couple of bugs.
Added StatusCode class and tests. Replaces Response.status string.
Fixed WSGIAdapter to use new StatusCode class.
Moved StatusCode to parsers sub-package.
Completely revamped how templates are rendered. Added 'Renderer' objects.
Updated readme file.
Fixed bug in readme example
Added some tests for the controller/view rewrite.
Reworked routes to allow or operators, so that alternative URI's can be specified in one route.
Reworked middleware to use context managers. Ditched next_ stuff.
Removed some unnecessary code.
Reworked controller tests. Added renderers tests (incomplete).
Added renderers.Format tests.
Fixed a bug in session middleware.
Added tests for BulkRenderer