- Update to version 5.4.0:
* Build fixes, code refactoring and other smaller changes.
* Fix grey result of indexed PNG in pdfrenderer.
* Rename frk -> deu_latf (ISO 639-3, ISO 15924).
* Remove broken Dockerfile.
* Fixes for several issues reported by Coverity Scan.
* Remove unsupported OpenCL code and related API functions (#4220).
* Facilitate vectorization for generic build (#4223).
* Add PAGE XML renderer / export (#4214).
* Support training without lstmf files.
* Improve CCUtil::main_setup (fixes issue #4230 related to Coda).
* Allow for text angle/gradient to be retrieved (#4070).
* Fix setup of datadir on installations with Conda (issue #4230) (#4240)
* Fix FP exception in Wordrec::angle_change (issue #4242) (#4243)
* Small build fixes and code improvements

- Disable opencl support due to boo#1213370:x