add gps field type
Merge remote-tracking branch 'upstream/master'
add the gps validate function and test values.
solve the jsformat issue
solve the jsformat issue
Merge branch 'master' of https://github.com/charlescao/medic-forms
Merge branch 'master' of https://github.com/charlescao/medic-forms.
Minor psychotically-OCD rearrangement of validate_gps; please don't take offense.

Conflicts:
	lib/input.js