Create a speeches base template for clean install.

Adding this base file means it does not have to depend upon the parent
project having a base template already in existence, and it is easy for
a project to override to use its own base template instead.
Move static files to temporarily appropriate places.

jQuery is needed by the app, so move it in there.
Reinstate the bits of the old speeches.css that are still used,
inside the speeches.scss file.
Move app-specific CSS to within app.
Move app-specific JS to within app.
Use URL view names rather than hardcoded.

Fix search forms when installed as app, and header link.
Rename home template, use default no-instance text

Move the request.instance lines to the project, along with the Leveson
template. Also remove the necessity of having the request template
context processor.
Tidy up header/footer in app base template.
Use sayit namespaced compressed keys.