ALLCAPS converted via CSS now, updated misty spam

I added a "stylers" class of options (but left them under the rewrite
list of options in the menu). The init code for the stylers probably
isn't as clean as it could be, but I wanted it to be short and similar
to the other options. Discussed in #52

I didn't simply rename the "rewriters" category to others since the 
code passes every message to every object in "rewriters". A CSS
based rule only needs to be applied once every time it is toggled,
so it makes more sense to me logically to separate the two.

Also the misty spammers were starting to get clever by using unicode
characters, I added a few of them to the filtered list.