card #62: added a mailto for the info mailbox

Added a very basic mailto element; minor other touches to punctuation.

This may be enough for the launch, but we can also create a mailing form, if you're into that. Either just for populating fields in the mailto link or for sending it ourselves server-side using with something like [pyramid_mailer](http://docs.pylonsproject.org/projects/pyramid_mailer/en/latest/). I've had some experience with pyramid_mailer and it works quite well, but obviously requires moving parts (coordinating with the smtp server) and can be a slight hassle particularly if we want to support file uploads.