Merge pull request #33 from zdenop/master

fix for Issue #32
option to use autoThresholding. Improved version from bachelor thesis JBIG2 compression http://is.muni.cz/th/208155/fi_b/.
and https://github.com/rhatlapa/jbig2enc
Correction in condition for checking if the representant is existing and removed also one duplicate code inside method for unifying symbols
remove unnecesary code, fix code and name style
Fix style and other issues.

This change has no sementic impact, rather it fixes style issues,
naming, formatting etc.
Merge branch 'zdenop-merge'
Close out ChangeLog for 0.28
Open ChangeLog for 0.29
Update src/jbig2.cc

Avoid infinite loop when processing TIFF file with a single image.

Fixes #36.
Merge remote-tracking branch 'upstream/master'