updated CHANGELOG (closes mjpost#23)

Merge pull request mjpost#24 from mtresearcher/ctrlChar-fix

Control characters are treated as normal characters

updated wmt19/dev checksum

fixed checksum

added EN <> KK

added {gu-en,en-gu} to wmt19/dev (lovely script)

added MD5 checksums to all datasets

Closes mjpost#18

added MTNT data sources and citation

changed floating point width

fixed version number