[src/_map.pyx] Add cython header

Signed-off-by: Anton D. Kachalov <mouse@yandex.ru>
[src/_core.pyx] Accept both qb_object_t and netref

Signed-off-by: Anton D. Kachalov <mouse@yandex.ru>
[lib/qb/__init__.py] Cleanup

Signed-off-by: Anton D. Kachalov <mouse@yandex.ru>
[lib/qb/console] Ignore TypeError on callable check to handle RPC attributes

Signed-off-by: Anton D. Kachalov <mouse@yandex.ru>
[lib/qb/rpc.py] qb_dom0_client: typo fix in connect* (pass self._port)

Signed-off-by: Anton D. Kachalov <mouse@yandex.ru>