Merge from piwik master

config/global.ini.php

core/Archive.php

core/Archive/DataCollection.php

core/Archive/DataTableFactory.php

core/ArchiveProcessor/Period.php

core/AssetManager.php

core/Controller.php

core/DataTableVisualization.php

core/FrontController.php

core/PluginsManager.php

core/Tracker/Request.php

core/Twig.php

core/ViewDataTable.php

core/ViewDataTable/Cloud.php

core/ViewDataTable/Properties.php

core/ViewDataTable/Sparkline.php

core/ViewDataTable/VisualizationPropertiesProxy.php

plugins/Actions/API.php

plugins/Actions/Actions.php

plugins/Actions/stylesheets/dataTableActions.less