Pyliblo

* 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.

* Fixed memory leaks, caused by failure to free() the result of
lo_server_get_url() and lo_address_get_url().
* Added parameter to Server.register_methods() to allow registering
functions of an object other than the server itself.
* Allow callback functions to have a variable number of arguments (*args).

* Avoid creating circular references when using methods as callback
functions, which in some cases prevented the server object from being
deleted properly.

* Patched the Pyrex-generated code to make it compile without warnings.
* Always build from the existing C source by default.

* Minor code cleanup, hopefully not breaking anything.
* Somewhat faster conversion of blob data from and to Python lists.