Use `Kaleidoscope.use`, `Kaleidoscope.useEventHandlerHook`, and
`Kaleidoscope.useLoopHook` instead of the deprecated `USE_PLUGINS`,
`event_handler_hook_use`, and `loop_hook_use` interfaces.
Signed-off-by: Gergely Nagy <kaleidoscope@gergo.csillger.hu>
The on/off functions were meant to make it easier to experiment, but
there are - and will be - better ways to achieve the same thing. So
remove them, lest anyone ends up using them.
Fixes#2.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>