Make openTextgrid() and save() parameters manditory

[timmahrt]

New features are added in a backwards compatible way--they are given default values--but this has obscured some important functionality.

These parameters should be changed to be required so that users are forced to make mindful decisions about how praatio manipulates their data.

[timmahrt]

This is in Praatio 5.0 now.

textgrid.openTextgrid() had an optional parameter readRaw. This was renamed to includeEmptyIntervals and made required.

For textgrid instance tg, tg.save there were two optional arguments format and ignoreBlankSpaces. ignoreBlankSpaces was changed to includeBlankSpaces (the variable was renamed and the logic flipped in the code).

Both parameters were made required.

[timmahrt]

Here are examples of the new interface

textgrid.openTextgrid(
  fn=name,
  includeEmptyIntervals=False
)

tg.save(
  fn=name,
  format= "short_textgrid",
  includeBlankSpaces= "false"
)

[timmahrt]

I will close this issue once Praatio 5.0 is released.

[timmahrt]

Praatio 5.0 is now released!