Regression: missing TESSERACT_VERSION

[zdenop]

Tesseract API changed with almost each release.
TESSERACT_VERSION was implement to help programmers (or tesseract library user) to support multiple version of tesseract APIs.
In current code (for 4.0 release) this part of API was removed.
I appreciate work to simplify storage of info version but missing TESSERACT_VERSION is showstopper for me for release 4.0 version.
4.0.beta1 (where TESSERACT_VERSION is included) is included new Ubuntu release and therefore there should be no API changes between 4.0 final release and 4.0.beta1 (at least there should be very good reason for such change).

[stweil]

I'll prepare a pull request which adds TESSERACT_VERSION again (derived from PACKAGE_VERSION) as it can be useful for external software which supports different versions of the Tesseract API.

[zdenop]

fixed with 10f4998

[stweil]

Thank you, @zdenop.