#1 - Refactoring to allow encryptors to be a service.
Update configuration_reference.md
#1 - Using container builder to add functionality
Merge branch '#1' of https://github.com/TDMobility/DoctrineEncryptBundle into #1
#1 - Refactoring to use a compiler pass
Adjusting reference.
Merge pull request #16 from TDMobility/#1

Allowing custom services to be used as encryptors