Eliminate content redundancies on Thanks pages

Removed block headline 'Thanks', removed redundant <p> content, and changed 'Now What?' link colors to blue.
Add supervisorctl job for django runserver

The build provisioner will now install supervisor and add a job for
the runserver. This job will start on boot of the vm, for now.

it can be stopped/started with:
sudo supervisorctl stop vegphilly-runserver
sudo supervisorctl start vegphilly-runserver
etc.
Remove empty template blocks.
Fix space before "!" in thanks pages

Stop using weird mid-line template inheritance. This was not
only hard to follow, but causing this bug.
Merge branch 'merge_ah2455_changes'