Rename webcomics column and avoid $moved variable warning.
Set Webcomic Media box priority to high.

This might help those users that aren't totally clear on how to add
media to their webcomic post.
Flush rewrite rules after legacy upgrades.

Another flush to make sure permalinks work properly.
Use history API for dynamic navigation.

This greatly simplifies dynamic navigation, avoids the ugly hash URL's,
and actually works slightly etter.