added basic toemail block

I've created a toEmail block. 

The rules expect a host, port, user and pw for smtp (defaults to Gmail's host & port, which are blocked within NYT :-1: ) and it also expects a toPath, fromPath, subjectPath, and msgPath for the email messages it will be sending. 

When the block receives a message, it attempts to pull the email properties from the given paths then creates and sends an email with that payload.

It's pretty easy to hook it into the wiki edits example and spam yourself. I added an extra 'map' block to add the to, from and subject then passed the summary along as the message body. I've got an export I can send over if you want to give it a shot.