0.1.0 - for testing

• ground-control base class
• input-control supports basic input and select types
  (but not files, checkboxes, or radios)
• toggle-control supports solo and grouped toggles
• Built-in WebC components
• Control element attributes:
  • id="<control-id>" [optional]:
    A standard HTML id for referencing the control
  • data-for="<selector>" [defaults to :root]:
    the elements to update
  • data-prop="<css-property-name>" [optional]:
    the CSS property to set
  • data-attr="<attribute-name>" [optional]:
    the HTML attribute to set
  • data-local="<localStorage-key>" [optional]:
    store and retrieve the value from localStorage
  • data-session="<sessionStorage-key>" [optional]:
    store and retrieve the value from sessionStorage
  • data-event="<event-name>" [optional]:
    only used by input-control at this point,
    which can listen for either change (the default) or input
  • data-off="<value>" [optional]:
    the value to use when no other value is selected
    (primarily for toggles, but also useful with select)
• button element attributes inside toggle-control:
  • data-value [defaults to the button.innerText]:
    provide a value for the toggle
    that is different from the text of the button
  • aria-pressed [optional]:
    set the initial pressed state of each toggle
    (only one in a group can be active at a time)
• Support for output displays and reset buttons:
  • Using the id of the input/select or the toggle-control…
  • <output for="<control-id>">:
    will set the output as a display for the control
  • <button data-reset="<control-id-list>">:
    will use the button to clear the referenced controls