Original commit message from CVS:
* testsuite/registry.py: Add some basic tests
* gst/gst.override: Don't ignore all gst_registry_* symbols
(_wrap_gst_registry_pool_plugin_list): Impl.
(_wrap_gst_registry_pool_feature_list): Impl.
* gst/gst-types.defs (Plugin): Add as a boxed
