python: Support status callbacks.
* lang/python/helpers.c (pyStatusCb): New function. (pygpgme_set_status_cb): Likewise. * lang/python/helpers.h (pygpgme_set_status_cb): New prototype. * lang/python/pyme/core.py (Context.__init__): Initialize 'last_statuscb'. (Context._free_statuscb): New function. (Context.set_status_cb): Likewise. * lang/python/tests/t-callbacks.py: Test status callbacks.
- Signed-off-by: Justus Winter <justus@gnupg.org>