Release v0.1.0-beta.30

Load OBS 33 plugins from the new core/ layout

OBS 33 packages ship each plugin as core/<module>/<module>.dll instead of
obs-plugins/64bit, so no sources, encoders or outputs loaded and the replay
buffer failed to start. Register the core/ module path, bump ObsKit.NET to
1.7.0 (1.5.5 can't load OBS 33 modules), and clear core/ on OBS updates.