change month to a number instead of the name of the month because there seems to be a problem with the letter "p", close #12
Forma date_string more to my liking
Bump date_layer boundaries by 1 (pxel?) to accomodate descenders
fix #13 and merge branch 'feature/date_improvements' of github.com:cdarwin/pebble-fancywatch into fix_date

Conflicts:
	src/main.c
fix bug which caused the month name to disappear (thanks to @cdarwin), update to v0.2.4