[automatic translation update] Updated 427 strings in 24 languages (fi, nl, be, ca, id, ko, lv, pt, sq, vi, ja, da, de, el, fr, it, bg, cs, es, ro, ru, sr, sv, sl)

removed build script as it's now on its own repository https://github.com/piwik/piwik-package/issues

Introduced the DI container

This reverts commit 3668fde1.

Customize privacy options on installation

The last step is now also not optional, you need to visit the page to mark installation as finished

fixes https://github.com/PiwikPRO/plugin-EnterpriseAdmin/issues/4 and #6584

The PrivacyManager plugins adds 2 settings to that form to let user disable (enabled by default) DoNotTrack and IP anonymization

Add more missing metrics from VisitFrequency.get API output (including max_actions_returning, nb_visits_converted_returning, etc.).

Add missing nb_users_returning metric to VisitFrequency.get Report metadata class so it will appear in 'processed' reports.

#5052 Enabled IP anonymization by default. To keep it disabled on previous Piwik installs, a migration script disable it on upgrade to 2.9.