[Nice] New API and refactor

[Youness Alaoui]

Hi,
My first step now in making libnice 'nicer' will be to fix the 
repository by removing all those files that have nothing to do there... 
example :
conncheck.h shouldn't be there
there are some vi/emacs temporary files in the repository
there are some Makefile files in the repository (not .am)

I will then rename/create some files with more meaningful names and move 
functions around so it will become easier to know where to look for 
specific functions.

Remi, if you have anything to suggest, please do so now. I also wanted 
to ask you what the stunbdc program was for ? is it just another 
misplaced test ? or does it actually need to be installed as a 'utility' 
to the library ? If yes, what for ? And how would you suggest we clean 
that file from the library files? would stun/lib and stun/apps 
directories be ok ?

Thanks,
Youness.