IncludedExcluded

This trait provides a keep function which will determine if a element T must be kept with regards to:

• a list of include tags
• a list of exclude tags
• a matchFunction which say if the element matches a given tag

The element is kept if it is included and not excluded

• it is included if the include list is empty or the element matches an including tag
• it is excluded if the exclude list is not empty and the element matches an excluding tag