setup.py: fix homepage and classify as beta
setup.py: fix homepage and classify as beta

The API should be relatively stable, because there is only one function
name.

Fixes #1.

Signed-off-by: Michael Walle <17b9e1c64588c7fa6419b4d29dc1f4426279ba01@walle.cc>

mwalle/rawsocket,mwalle/rawsocket