Log Message:
Update to 2.6
All changes for pthai.el
- highlight thai text when looking up or playing audio
- highlight text and move cursor as audio played for words
- add customize toggles for message display when playing audio
- add customize toggle to prevent downloading audio
- add customize toggle to prevent playing audio
- fix pthai-say* args to actually force downloads
- (thing-at-point 'thaiword) works for thai words not separated by spaces
- other clean ups