There was a ton of work done in this commit:
1) Added `RSSMediaChannel`, which contains an array of `RSSMediaItem` objects and corresponds to an RSS `channel` element.
2) Documented everything- headers, properties, methods, you name it. ;) Added `#pragma mark` statements to break up the content too.
3) Added tons of unit tests, including (drum roll...!) unit tests verifying objects are parsed and mapped correctly! In future, may decide to add unit tests to verify `NSCoding` on all models too.
4) For the time being, also trimmed back some content (e.g. WordPress properties on `item`). The main reasons for this were two fold: (i) I don't currently have a need for it, and (ii) I haven't looked into where the documentation is for it. However, I would not be opposed to adding full support for these as needed, as long as appropriate unit tests were added too.