[En-Nut-Discussion] my mutex & semaphore implementation

[Matthias Ringwald]

hi

as recently announced, I implemented recursive mutex functions and 
semaphores for nut/os.
have a look at:

http://www.inf.ethz.ch/~mringwal/downloads/nut-semaphore.tar.gz
http://www.inf.ethz.ch/~mringwal/downloads/nut-mutex.tar.gz

if there are no complaints, I'd like to put it into the os/ directory.
if people don't like it there, it could be put on the ethernut project 
page.

greets,
matthias