The worker indicate each new request using semaphore

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

Now logging a python traceback

Adds a global flag for worker indicating their status (add checks for
each semaphore change)
The pool handler will no longer have to decrease the semaphore value when
a child exit.

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

And better handling of entrypoint import failure...

Bugfix consist of replacing the magic wrapper instance of os.environ (
aitomatically call os.putenv) by a normal dict instance.