Adds 'skip_read' flag for comments only containing :nodoc:

* skip_read flag set by comments that eql ':nodoc:'
* prevents emails from being sent that encourage subscriber to read
  docs which are essentiall blank
* side effect that these docs won't be sent out for write either
Merge pull request #10 from KyFaSt/master

Adds 'skip_read' flag for comments only containing :nodoc: