Import Launchpad translation updates from 1.3
Document previous translation updates
[QA] Remember Exif library removal on Windows deinstall.
Windows build installation steps in installer.bat script file.
Define Windows build version in the Installer script.

Potentially this could be set in the environment (i.e. in the installer.bat)
but under Wine I couldn't get it to work that way.
Merge branch 'i18n-launchpad'