Folia

* Implement FoLiA v2.5.0 which more strictly defines whitespace behaviour (proycon/folia88)
* Adds support for xml:space
* Implemented t-hspace element
* Implemented Unicode NFC Normalization when retrieving any text content
* Implemented processing tags (proycon/folia93)
* Added t-lang element (proycon/folia94)
* Added a new substitute() method
* [FQL] Added support for setting textclasses, fixes for proycon/flat173
* [FQL] Added support for setting/unsetting processing tags

Minor bugfix release: do not serialize metadata attribute if the submetadata element doesn't exist (prevents invalid FoLiA)

Bugfix release for handling very large (or many) documents: Enable XML_HUGE_TREE option by default

Bugfix release:

* the fixunassignedprocessor procedure should assign the first annotator rather than the last (it's more likely that the bug occured where only one annotator existed)

Bugfix release:

* Implemented important backward compatibility for text consistency validation prior to FoLiA v2.4.1, fixes the regression in issue 92, relates to 88