Issue #2606334 by Gábor Hojtsy, YesCT, dawehner, Cottser, larowlan, Wim Leers,...

Issue #2606334 by Gábor Hojtsy, YesCT, dawehner, Cottser, larowlan, Wim Leers, catch, davidhernandez, nevergone, effulgentsia, attiks, David_Rothstein, chx, MustangGB, tim.plunkett, plach, joelpittet, Ryan Weal, thamas, LewisNyman, gaele, bojanz, yoroy, skyredwang: Update CHANGELOG.txt for the release (compile list of high level changes)