Fixes #98
Configurations to use sendmail in development, when user submits a Contact form
Fixes #75.  Adds a setup_mail.rb.template which is intended to be copied to setup_mail.rb and configured with SMTP mail credentials.  Configures development.rb and production.rb for SMTP use.  Added section to README to list all configurations needed in order to get Contact form emailing working.
Formatting tweak