Remove the IRC notifications from Travis (we're not using IRC anymore), and the
stable/experimental badge from README.md (because they aren't being kept up to date).
Signed-off-by: Gergely Nagy <algernon@keyboard.io>
While we use milliseconds internally, the end-user will not need higher
precision than a second, therefore, store the settings with second-precision.
This is much friendlier towards the user, and also uses less space in EEPROM, by
about six bytes.
Addresses a part of #8, thanks @gedankenexperimenter!
Signed-off-by: Gergely Nagy <kaleidoscope@gergo.csillger.hu>
Use `Kaleidoscope.use` and `Kaleidoscope.useEventHandlerHook` instead of the
deprecated `USE_PLUGINS` and `event_handler_hook_use` interfaces.
Signed-off-by: Gergely Nagy <kaleidoscope@gergo.csillger.hu>