1.0.0

added

• entry point group crowsetta.format to make it possible to 'install' formats
  • removes special casing for built-in formats, they just get added via entry point
  • instead of parsing a config.json file built into the package
• module for working with Praat Textgrid format
• Meta class which represents metadata about a format
  • such as file extension associated with it
  • and the module / functions that a Transcriber instance should use
    to work with this format

changed

• Each instance of Transcriber has only one vocal annotation format that it handles
  • because it's annoying to type file_format every time you call a method like to_seq
  • instead you just make an instance of Transcriber for each format you want
  • This also works better with crowsetta.format entry points and Meta class;
    when you instantiate a Transcriber for a given voc_format, the __init__
    uses the Meta for that format to figure out which function to use for to_seq,
    to_csv, etc.
  • For this reason bumping to 1.0.0, new Transcriber not backwards compatible
    • although this will be inconvenient for millions of people