Add translations to speech form
Show alternative submit for "Save and add another speech"
Redirect save and add another to add?section=...
Remove dependency on javascript for "Add another"

This uses a slightly annoying NoWidget hack, and Django still renders a
'controls' section for the form field.  Will check for better way
Tests for 'add another'
Refactor test to use assertRedirects
Correct comment
Refactor add_another into a POST check instead of form field