GSoC: finagle-smtp - initial

This is initial version of SMTP client for Finagle, which I am working on during GSoC'14.
For now it supports sending independent commands to SMTP server and sending a simple text email to one ore more addresses (without cc, bcc and reply-to). Usage is described in `README.md`. 
"but does not send greeting to it" => "but does not return a greeting"
"without that" => "without it".

By incorrect, do you mean malformed?