updated composer deps
Fix getOTherParticipants

If the participant is not found, array_search will return false and this will remove the first participant from the array
Added missing parenthesis in line 55.
sf 2.3 composer update
FIX: Wrong PHPdoc in FOSMessageBundle / Controller / MessageController.php
Fixed typo & PHPDoc
Removed gratuitous paragraph

Namespaces are handled by composer; also registerNamespaces() is not available in symfony 2.1 any more
Fixed Doctrine\Common\Annotations\AnnotationException

The error was:
  [Semantical Error] The annotation "@Doctrine\ORM\Mapping\generatedValue" in property Acme\Message  
  Bundle\Entity\Message::$id does not exist, or could not be auto-loaded.