move delivery method to deliver block
set mail to have sender similar to github's

Sepcifically, use the Sender header to specify the server that sent the message
and the From header to specify the user who made the commit. This generates the
"On Behalf Of" information and allows nice, easy filtering.
inline simple items and move Google info to config
join mail body adds together
adjust email template to be similar to GitHub's
Use bundler.
Use dotenv.
Use sinatra. Load config from config.yml. Send to only developers and masters.
Remove a line for debugging.
Extract the method to generate mail body.
Add a missing param.
Ignore team members in ignore list passed as a GET parameter. Stop checking access level.
Integrated changes from squid314 and shuhei