finish out the movie in the default tasks
add user_tz as an arg to TodoGrid
update the TodoGrid to generate thead properly

- Add some docstrings to update what is going on
- Override methods for default headers to use <th>
- Pull in glyphs from latest bootstrap while we are stuck on 2.0.x
- Update the ordered headers to show a chevron to indicate sort order
move the TodoGrid into its own module