New features:
* Add option to list words before and after `--words-before`, `--words-after`
* Make export (`--export`) more deterministic with alphabetical sorting
Bugfixes:
* Fix utf-8 encoding error on Windows (thanks to anetschka)
* Add missing dependency on pyyaml (thanks to mnaberez)
* Fix `-V` not printing the program version
* Fix exporting for words with no grammar data
* Remove extra newline in export output
Internal:
* Test data fix due to upstream dictionary data change