Movement 2.0

[mcguirepr89]

Hello, again. I just wanted to share two changes that I have put in place in my tinkering with the current version of movement (1.0 I suppose?).

I have added two small features that I've grown to appreciate greatly:

1. I added a "EVENT_{ALARM,LIGHT,MODE}_REALLY_LONG_BUTTON_{DOWN,UP}" event for each button that extends each button's functionality.
2. I added a "MOVEMENT_TERTIARY_FACE_INDEX" that allows me to organize my watch faces a little better.

I don't mean to bring up the first one in any attempt to have that PR reviewed with any haste (especially during the refactor), but just wanted to flag these as super helpful changes that I've made and that I know I would end up adding into movement 2.0 were they not to be available.

Thanks again for all you do!