build: include tests in release tarball
build: fix typo in step definitions files list
build: strip unneeded test env setting and fix test install
Prepare for release 3.13.3
Post-release version bump
tests: allow tests to use translations


Instead of looking for specified string first try to translate it to current language (set via
LANG env)
tests: add screenshot tour test

This would help designers to check app looks (see screenshots
 in installed-tests/eog_screenshots) and translators
tests: don't inlude pointer in screenshots
tests: give nice name for screenshot tests and add more locales
tests: merge screenshot tour tests