v0.3.3

[thammegowda]

• bug fix: xml reading inside tar: Element tree's compain about TarPath
• mtdata list has -g/--groups and -ng/--not-groups as include exclude filters on group name | closes #91
• mtdata list has -id/--id flag to print only dataset IDs | closes #91
• add WMT21 tests | closes #90
• add ccaligned datasets wmt21 | closes #89
• add ParIce datasets | closes #88
• add wmt21 en-ha | closes #87
• add wmt21 wikititles v3 | closes #86
• Add train and test sets from StanfordNLP NMT page (large: en-cs, medium: en-de, small: en-vi) | closes #84
  • Add support for two URLs for a single dataset (i.e. without zip/tar files)
• Fixed a language match bug #92 / #93
• Fix: language compatibility checks; Closes #94