Improvements to attachment plugin
Remove proprietary header
Remove duplicate filename rejection
Fix helo.checks plugin
Merge with upstream
Merge pull request #623 from smfreegard/master

Improvements to attachment plugin
Fix helo.checks again.. add further test
Remove comment
Merge pull request #646 from smfreegard/master

Fix test failures
logger: added missing semicolons
check for util.inspect.colors (see also #632)
logger, 3 changes to improve testability

1. move variables to into class (testability)
2. added "return true" when methods exit normally
3. replaced a === NaN  with isNaN()
log.syslog: test improvements
tests/logger.js: added