Turn analysed xml files found in a corpus-XXX/analysed directory
into vrt xml files saved to the corpus-XXX/korp_mono directory.
This is a rewrite of the korp_mono.py script in corpustools, for
speed.
The subdirectory korp-mono-fill-gen contains a program to look up lemmas
that could not be automatically determined from the analysis using a generator
fst, and replace the with the text from the generator.
In other words, after running korp-mono, make sure to run
korp-mono-fill-gen.