Fixed style of error messages in NotificationCenter.
Added type `ParameterInformation::TYPE_DOCUMENTIDARRAY` for blocks parameters.
Merge pull request #541 from franckstauffer/i18n

Various fixes and cleanups
Merge pull request #542 from fredericbonjour/Admin

Added type `ParameterInformation::TYPE_DOCUMENTIDARRAY` for blocks parameters. Fixed style of error messages in NotificationCenter.
Second argument getDefinitionCollection / getDefinitionKeys supports strings

fixes #540
Support for console only commands