Update README.md
Joined all the attribute readers.
Moved long assignment into smaller more readable lines.
Cleaned the long unreadable statement into smaller seperate lines.
Removed extra empty line at the body end.
Changed to Ruby 1.9+ hash syntax.
Avoid double negation.
Allow app to start w/o ERRBIT_EMAIL_FROM
Merge pull request #712 from bdehamer/optional-errbit-email-from

Allow app to start w/o ERRBIT_EMAIL_FROM
Merge pull request #702 from brianvanburken/refactoring

Legibility improvement on ErrorReport
Merge remote-tracking branch 'upstream/master'
Update from upstream master.
Merge pull request #690 from tomciopp/patch-1

Update README.md