Merge branch 'master' into php-5.3-namespaces

Conflicts:
	core/Access.php
	core/Config.php
	core/EventDispatcher.php
	core/JqplotDataGenerator/Evolution.php
	core/Piwik.php
	core/Plugin/MetadataLoader.php
	core/ViewDataTable.php
	core/ViewDataTable/Cloud.php
	core/ViewDataTable/GenerateGraphHTML.php
	core/ViewDataTable/HtmlTable.php
	core/ViewDataTable/HtmlTable/AllColumns.php
	core/ViewDataTable/HtmlTable/Goals.php
	plugins/Actions/Controller.php
	plugins/CoreHome/Controller.php
	plugins/CoreHome/DataTableRowAction/RowEvolution.php
	plugins/CoreHome/templates/_dataTable.twig
	plugins/CustomVariables/Controller.php
	plugins/DBStats/Controller.php
	plugins/DevicesDetection/Controller.php
	plugins/ExampleUI/Controller.php
	plugins/Goals/Controller.php
	plugins/Live/Controller.php
	plugins/Provider/Controller.php
	plugins/Referers/Controller.php
	plugins/UserCountry/Controller.php
	plugins/UserCountryMap/Controller.php
	plugins/UserSettings/Archiver.php
	plugins/UserSettings/Controller.php
	plugins/VisitTime/Controller.php
	plugins/VisitTime/VisitTime.php
	plugins/VisitorInterest/Controller.php
	plugins/VisitsSummary/Controller.php
	tests/PHPUnit/proxy/index.php