email changes

- make email destinations more configurable
- remove crappy SMTP logging appender
- cleanup email code / templates
remove unnecessary logging dep
notify on all completions
template tweaks
more email tweaks
send task completed from decommissioning
more work on email config changes
some more specific email settings
fix issue where task status isn't configured
fix template issue
request pause + unpause + removed mails
jade fix
Merge pull request #242 from HubSpot/email_configuration

email changes