Added Contact Us Page

Added a contact us page that sends an email to the email defined in the config file (bases_team_chat by default). Closes #4.

Note, that in order to do this I had to add two dependencies. In order to set this up in production you'll need a sendgrid account (http://sendgrid.com). Copy the config.example.json file to config.json and then add in your sendgrid credentials then you should be good to go.