Issue #222: Fix the @coroutine decorator for functions without __name__
attribute like functools.partial().

Enhance also the representation of a CoroWrapper if the coroutine
function is a functools.partial().

Update repo reference from google code to github

add in .gitignore pyvenv and PyCharm files

Rename README file to have rst render on Github

again if the first call to connect() raises an InterruptedError.

When the C function connect() fails with EINTR, the connection runs in
background. We have to wait until the socket becomes writable to be notified
when the connection succeed or fails.