Refs #4040, #4041 removed rest of viewdatatable set/get/enable/disable property functions, did the same for all other ViewDataTable classes, moved most of ViewDataTable/HtmlTable logic to visualization instead of main class and re-add links for UI integration tests.

Checking if format is not nil before logging. Thanks for the PR!

Missing file used to test that unserializing pre-Piwik2 datatable still work (ie. the data is serialized as Piwik_DataTable_Row objects, the bridge class is defined in core/functions.php)

renaming Unzip to Uncompress,
Renaming Tracker/Referer to Tracker/Referrer,
and few more

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

Refs #4040, #4041, fix sparklines regression caused by datatable css refactoring and clean up the getLastUnitGraphAcrossPlugins function (modified to set properties directly).

Refs #4040, #4041, added ability to access view properties directly, started documenting view properties and modified ExampleUI plugin to set view properties directly.

Update tests/README.md to include information about setting the DB password for the tests

Refs #4040, converted VisitorInterest plugin to use display properties instead of ViewDataTable methods.

Refs #4040, converted UserCountry plugin to use display properties instead of ViewDataTable methods.

automatic translation update

Refs #4040, convert DevicesDetection plugin to use display properties instead of ViewDataTable methods.