Release 1.4.4

Improvements:

• Support for TextGrid files in old "short format" (#11).
• Updated documentation building:
  • Offline documentation building with sphinx.
  • Automatic online-documentation building with readthedocs: → https://textgridtools.readthedocs.io/en/stable/.
• Added Zenodo–Github integration that provides a citable DOI for each release (see below).

Bugfix:

• Fixed a bug when reading eaf-files with empty annotations.

This release can be cited/linked to using the DOI 10.5281/zenodo.2552765