new release: 4.0.7

MILESTONE#4 = xtsv and dummyTagger separated, UDPipe, Hunspell added,

many API breaks compared to the previous milestone,
Runnable Docker image, dropped DepToolPy, and many more changes.

MILESTONE#3 = dependency parsing, chunking and named entity recogniti…

…on tested and work on a 100.000 word text.

MILESTONE#2 = xtsv tsv-handling framework finalized. Tokenization + m…

…orphological analysis + POS tagging (emToken + emMorph + emLem + emTag) tested and work. Also on a 100.000 word chunk of text.

Bump PurePOSPy with its default model (remove szeged.model form this …

…repo)