Merge pull request #5 from pawelulita/master

Bugfix #1240770
update translations.
Merge branch 'master' of git@github.com:kassoulet/soundconverter.git
Add screenshot dimensions in appdata.xml
"Replace all messy characters" uses to blacklist and removes only several reserved characters (bugfix #584603).
Merge branch 'bugfix-messy-chars'