Merge pull request #141 from piwik/translationupdates

[automatic translation update] Updated 56 strings in 4 languages (de, fr, ru, vi)
updated DBStats language files
updated submodule
Refs #4273 Making UI text more clear + fixing bug in privacy settings (nonce was missing)
Refs #4273 missing i18n
Fixes #4272 Not displaying messages when there are no segments to pre-process
Refactor the string to show coupling
Fixes #4237 Forwarding segment parameter on refresh
Refs #472 trimming event attributes and adding test ensuring labels are not truncated
Refs #427 Adding fixture of an event without URL defined
icon spacing so it looks good
Fix missing i18n reported in http://forum.piwik.org/read.php?2,107293
Refs #472 move getIdActionFromSegment to TableLogAction class
Refs #472 adding Events segments: eventCategory and eventAction and eventName and eventValue segments and some tests
Refs #472 Making eventValue match work by only matching events actions + adding test
Refs #472 Enabling plugin in tests
Refs #472 Adding Events Segments tests
Run integration tests first on travis CI
Refs #472 Checking in test files
Clean up travis file