Transcribe add label

Hi all, 

In order to make the page more accessible for users of assistive technology, I've added labels for the transcription and discussion text areas. 

For more information about this, see section 2.4.6 of the W3C Web Content Accessibility Guidelines (http://www.w3.org/TR/2008/REC-WCAG20-20081211/#navigation-mechanisms-descriptive).

If you think the labels are redundant or unnecessary for visual users, one option is to hide the labels by positioning them offscreen. That way the presentation of your page will not change, but the labels will still be present for assistive technologies.