Original commit message from CVS:
* examples/gst/play.py:
* gst/gst-types.defs:
* gst/gst.override:
* testsuite/Makefile.am:
* testsuite/common.py:
* testsuite/event.py:
* testsuite/test_event.py:

Use gst.element_factory_make in play example

Use boxed instead of pointer for gst.Event, it was such an ugly
hack.

Ref the event when sending using gst.element_send_event.

Add a bunch of testcases (and a C module), renamed event to
test_event.py