Update instances requirement.

To get port number fix when used within a hosting project.
Include admin in example project.
blank slate messages for homepage, speeches page, and speakers page
header buttons on speeches and speakers pages
better titles for speech and speaker forms
fix nested foundation padding on form columns
better titles for add/edit section form
better spacing for double buttons in page-headers
make it clear why we’re asking them to create a speaker not a speech (for now!)
more compact speech editing form