Merge pull request #142 from piwik/translationupdates

[automatic translation update] Updated 301 strings in 6 languages (bs, de, el, it, sk, vi)
Refs #4278 Creating a new class PluginsArchiver to refactor logic out of ArchiveProcessor\Loader
Moving around
Merge remote-tracking branch 'origin/master'
Fix bug
Minor
Fix build
Phpstorm organize imports
Phpstorm organize imports
Phpstorm organize imports
Updating submodules
add some more infos to translation pull request