v1.15
- added (still experimental) code for a FoLiA Builder, Processor and
TextProcessor class.
Use with care. The API may change unannounced! - a foliadiff script (using folialint) is installed now
- several refactorings, to make the code more clear.
- the 'ref' attribute was not serialized for TextContent
- several smaller small bug fixes
- the .so version is bumped to 9 because of a lot of API/ABI changes