default functionality

initial fieldset no longer submitting form; clicking on the next button
triggers the next fieldset of questions to be shown, but only after
ensuring the user has provided their name and their child's name.

second fieldset (first set of questions) basic functionality in place.
input ranges and sliders are hidden; if the user selects a checkbox,
ranges/sliders toggle for more input.

NOTE: currently set up piss poorly...clicking on any checkbox will show
ALL the ranges/sliders, not just the ones unique to the form control.