Lotus::Note now has #text and #html properties.
Adds #to_html to Lotus::Note.

This method will produce html for the given content.

There will need to be a way to resolve usernames to urls and produce a
proper mentions list. Basically, a block passed in that can resolve a
string username/domain to a Lotus::Author.
Adds capability to pass block to resolve usernames in Notes.
Adds #mentions method to Lotus::Note.

This method, when given an appropriate author resolve block, will return
an array of Lotus::Authors that are mentioned within the note.
Adds #reply_to method to Lotus::Note.

This method determines (with an appropriate Author resolve block) who
the note is in reply to.