Enable the showing of date/time in change_form

- Enable display for <p>
- Clean up change_form.html
- Better align of base.html to django base.html
Merge pull request #43 from gary-pei/master

Enable the showing of date/time in change_form
Consolidate duration hours and minutes
Merge pull request #44 from gary-pei/master

Consolidate duration hours and minutes