Updated URI format to only accept HTTP(s) URIs
Updated URI format to only accept HTTP(s) URIs

Note this is a willful deviation from the JSON Schema spec which does
not restrict URIs to HTTP(s) URIs. In practice, most if not all URIs
requested in a form are HTTP(s) URIs, so the restriction makes sense
not to force JSON Form users to specify their own regular expression
to restrict the scheme.

ulion/jsonform,capriza/jsonform,widgetworks/jsonform,yklykl530/jsonform,widgetworks/jsonform,jsonform/jsonform,iainbeeston/jsonform,tagyangyang/jsonform,joshfire/jsonform,globocom/jsonform,imkevinyang/jsonform,jsonform/jsonform,ulion/jsonform,imkevinyang/jsonform,suricactus/jsonform,capriza/jsonform,nishant8BITS/jsonform,mrthan/jsonform-rails,nishant8BITS/jsonform,suricactus/jsonform,joshfire/jsonform,globocom/jsonform,tagyangyang/jsonform