Character panel

[Eric Wasylishen]

Hey,
I wrote this character panel a while ago, and just got it tidied up and 
committed yesterday. It opens via a button in the font panel. I'd be glad to 
hear feedback. :-) (libicu is required). 

It lists all assigned Unicode characters (currently around 100000) in an 
NSTableView and filters them by name as you type in the search box. I think 
it's a pretty comfortable way to get to a character if you know part of the 
name.

Possible improvements could be making an icon view mode the shows characters in 
a grid, and adding a list of unicode blocks arranged in a hierarchy to make 
browsing to a certain block easier.

-Eric