New documenation look

[Adam Fedor]

Note as part of the recent release, there is a new look to the  
documentation thanks to Adrian Robert.:

http://www.gnustep.org/developers/suite.html#doc

I also added a Release Notes section and a section on OpenStep  
compliance for the Gui library (that's when I was really bored).

http://www.gnustep.org/resources/documentation/Developer/Gui/Reference/ 
index.html