* Move from .c to .h as needed for consistency.
* When missing from both, copy from pull request or wiki.
* When missing entirely, infer functionality from source code.
* Initial work on probability watch face
* Complete probability watch face
* Restore default movement_config
* PR feedback: PR watch face title, use arc4random, clean up warnings
* Use rand instead of arc4random when building on emulator
* Accidentally overwrote movement_config