PHP-944: Support $out aggregation pipeline operator
Add a comment that the value of these is significant
Remove trailing new line and add a newline between the functions as requested
Bump to E_WARNING and add MongoLog output as per review
Merge pull request #557 from bjori/PHP-944-out-aggregate-pipe

PHP-944: Support $out aggregation pipeline operator

* bjori/PHP-944-out-aggregate-pipe:
  Bump to E_WARNING and add MongoLog output as per review
  Remove trailing new line and add a newline between the functions as requested
  Add a comment that the value of these is significant
  PHP-944: Support $out aggregation pipeline operator