- fixed missing model instance in event model.before_save
- added boolean field type
- added Utils class
- dateims are now converted to string in Model->toArray()
- Storage->serialize() and Storage->unserialize() now use the Utils class for DateTime conversion
- Core Models now all inherit from a Basic Model that contains updatedAt and createdAt datetime fields and an bool active field
- The core plugin automaticly sets createdAt and updatedAt field values using model.create and model.before_save events
- made tests work with the new ever changing datetime fields