Log Message:
Update to version 2.36
- add pthai-classifier-practice-(region/line/buffer/file), simplify class
- clarify comments, a few minor code cleanups in a couple places
- rename pthai-dictionary-def-p -> pthai-dictionary-any-p.  change
  semantics of pthai-dictionary-def-p
- add &optional force to pthai-classifier-by, pthai-classifier-for
- add option for classifiers in pthai-practice-words, add
  pthai-classifier-practice-region/line/buffer/file
- remove optional audio parameter from
  pthai-practice-region/line/buffer/file