Minor logic defect in error handling.
Lint.
Fixed feedback error handling.

Only emit `error` in the event of an unrecoverable error (Being unable to load certificates/keys from disk) In other instances emit `feedbackError`
Improved doc.

Added links to Google group and moved some doc to more sensible places, out of read me.
setCacheLength method.
New Notification configuration methods and they're now chain able.
Added some initial examples.
v1.3.5