Pyliblo3

* Changed send functions to raise an IOError if sending failed (probaby
most useful with TCP connections).
* Lots of code cleanup and deobfuscation.
* Included unit tests in release tarball.

* Support Python 3.x. As a result, pyliblo can no longer be built with
Pyrex, and requires Cython >= 0.12 instead.
* Added free() method to Server and ServerThread classes.
* Added fileno() method to Server and ServerThread classes (thanks to
Edward George).
* Prefer read-only properties over getter methods (which still exist, but
are now deprecated).
* Added proper docstrings (copied from the HTML docs).
* The minimum version of liblo required by pyliblo is now 0.26.

* Release the Python GIL inside Server.recv().
* Fixed a possible segfault when the error handler was called from the
* liblo server thread.

* Changed license from GPL 2 to LGPL 2.1 (as did liblo in version 0.26).
* Added protocol parameter to the Server class. Among other things, this
allows TCP connections.
* The minumum version of liblo required by pyliblo is now 0.24.
* pyliblo can now be built with either Pyrex or Cython.

* Fixed all compiler warnings properly in Pyrex, without patching the
generated C code.
* Return values of callback functions are no longer ignored, but handled
as in liblo.
* The send_osc script can now be run with an explicit type string,
instead of trying to determine the argument types automatically.

* Added manpages for send_osc and dump_osc.