Make asPrimitiveId a static method
Remove unless code to prevent custom DBObject to be checked

Hack to prevent DBObject to be checked has been removed in a previous
commit 4d12b35
[maven-release-plugin] prepare release 1.1-early-20140221-1732
[maven-release-plugin] prepare for next development iteration
Bump jackson and bson4jackson version to 2.3.1