Refactoring configuration for DerivedCharging
Refactoring the code around derived charging to support integration with responder for internal requests, some of the copyright headers updated with new slogan
More derived charging infrastucture and tests
Session manager refactoring to work with derived charging
Integration of DerivedCharging within mediation
Adding META_DEFAULT to FSevent parsing
Merge branch 'master' of https://github.com/cgrates/cgrates
Fixup duration parsing, adding some tests