Handle multiple SMTP messages with one connection.

mailcatcher has had a long-standing issue whereby it doesn't handle
multiple mails over the same connection.  This is actually a problem
with the SMTP server in EventMachine itself, but the fix still hasn't
been merged into EM yet.  There's an open pull request, and the
easiest way is to monkey-patch what we need.  For more details:
https://github.com/railsware/eventmachine/commit/a23d4828
Merge pull request #1 from globaldev/eventmachine-le

Handle multiple SMTP messages with one connection.
Update mailcatcher with deliver pop-up and forward function
change dependencies' version to fit in globaldev
Fix the JS for delivery address prompt by only binding a single event handler
remove default email address in prompt
Move JS fixes to CS
remove default email address from pop up
Merge pull request #2 from globaldev/forward-email

Forward email
use dotenv to hide credentials
Merge pull request #3 from globaldev/hide-credentials

use dotenv to hide credentials