Become for [b] and [i] now supported in posts

UI change, catalog, expand, and jump buttons all moved to the crown
'Anonymous' now correctly displays for empty-named posts, for OPs and replies alike

bbcode support, and all preview post body parsing benefits, are now added to OP bodies.
improved bbcode support

added '>>' quote support
added missing newline break to the end of quotes
quotes now are properly rendered even if not followed by a newline (i.e. at the end of the post body)
Removed vestigial 'expand all in thread' button and related code

changed default font sizes

added quote/link icons for all posts, no functionality; that'll be added later
added 'music' and 'video' boards to the quick links on the crown