API Maintenance

Deprecating old image related classes in Colby.

The last few weeks I've been working hard to deprecate some very old image APIs in Colby. They were being used by some custom views for various clients which made their deprecation a highly detailed and complex process.

The APIs deprecated were very old, from near the beginning of the Colby project, and really have no place whatsoever anymore. My latest views and APIs are much better architected to allow for future improvement or deprecation. And now there is one simple responsive image view, CBArtworkView, that can be used by all sites.

In addition I added the Parsedown markaround parser as a submodule of Colby to being to replace my custom Markaround format. Parsedown is great because it's single file simple solution.