Add basic support for hours as an option.
Improved hour support, including new design for Duration window.
Add RockShot Pebble + RockShot JavaScript as submodules.
Add support for capturing screenshots of the app using RockShot.
Update to latest version of RockShot (without the memory leak).
Merge branch 'rockshot' of github.com:smallstoneapps/multi-timer into rockshot

Conflicts:
	pebble/src/libs/rockshot