libpyfcgi.IoOut can be use for stdout & stderr for alternate workers too

Add a -l --listen option to set the socket path or address:port
Fix a bug using thread safe functions from libfcgi

This overflow was avoided using the volatile i

Defining a PYFCGI_STATS_SZ = 15 * 60s = 900

- send buffer formated by stats functions to clients
- close client socket if needed
- allow bind to reuse an address if nobody listen on it

The worker indicate each new request using semaphore

Implementing a dummy stream response loop sending PyFCGI version

Creating new files to handle IPC stuffs : include/ipc.h src/ipc.c

Now logging a python traceback

Add a -t --timeout and a -f --fast-spawn option for further commit

Add --verbose -v option to log on stderr

The url_scheme is static to "http" for the moment...

Note : segfault on virtualenv tests...