This is a first attempt to resolve #1 . It's still too CPU intensive
 and is not complete.
Merge branch 'sendrecvfile'

Conflicts:
	src/py-udt4.cc
Merge branch 'devel'
Adds the possibility to bind directly on an existing UDP socket. UDT 4.11 or later required from now on.
Merge pull request #7 from Nolhian/master

Adds a function to bind directly on an existing UDP socket
Udt now has a git repo, use theirs rather than my hosted mirror
Epoll fix ref #6

Rather than creating a new socket on every instance of epoll.wait(),
store the PyType in a std::map and return the original object.