- [DONE] add strict validation for objects
- set up global and specific configs
- [DONE] implement nested objects validation
- implement validation for Collection of Models (unicity, range...)
- [DONE] implement mutli-group validation (currently only one group at the time)
- [DONE] ability to implement custom Asserts -> Callback()
- [DONE] ability to bind less object oriented and more json oriented validation to objects
- [REMOVED] remove groups checks and errors on Constraint / Collection ?