title: Meteor - Autoform combine date and time fields after submission
body: <p>I am using autoform to generate an "event" form. On the event I have a start date, start time, end date, end time. In the database I only want to store "start" and "end" which would be the dates and times combined. I can do this manually, but I'm having no luck doing it with autoform. How do I generate fields that are not part of my schema and have those go with the "doc" to my before submission hook? Is that the best way to do this? Right now I'm trying the following:</p>
  
  <p>Schema: </p>
  
  <pre><code>   start:
        type: Date
        label: 'Start'
     end:
        type: Date
        label: 'End'
  </code></pre>
  
  <p>Template:</p>
  
  <pre><code>template(name='eventsNew')
     +autoForm(collection='Events' id='insertEventForm' type='insert')
        fieldset
           legend Add an event
           +afQuickField(name='type')
           //- How do I output fields not in the schema and have them go to the form hooks? These output, but I can't get fields that are not part of the schema to work.
           +afQuickField(name='start')
           +afQuickField(name='end')
        button.btn.btn-primary(type='submit') Submit
  </code></pre>
  
  <p>Form hook:</p>
  
  <pre><code>AutoForm.hooks 
     insertEventForm:
        before:
           insert: (doc)-&gt;
              # Here is where I would think I could combine the times and dates
              # but I can't get them to come through.
              console.log doc
              doc
  </code></pre>
  
  <p>I've tried afFieldInputs for the dates and times, but they don't generate anything. Not sure what I'm doing wrong. Thank you in advance for the help.</p>