Implemented +[NSCharacterSet newlineCharacterSet]

[Eric Wasylishen]

Hi,
I just wanted to say that I implemented the +newlineCharacterSet method in 
NSCharacterSet. This just contains 0x000A (LF) , 0x000D (CR), and 0x00085 
(nextline). I think I did everything correctly (updated 
dev-apps/charsets/mkcharsets.m, downloaded the Unicode data file, used 
data2header to regenerate the NSCharacterSetData.h file).

One thing to note is that the Apple NSCharacterSet docs count 0x000B (vertical 
tab) and 0x000C (form feed) as newline characters, and include them in 
newlineCharacterSet and witespaceAndNewlineCharacterSet, while GNUstep does not 
at the moment.

-Eric