User ID is NULLable now results in expected tests results: nb_users = 0 when no user id was set. refs #3490 #6162

User ID should be defined as dimension

fix regression when HTTPS URL is different from HTTP Tracker URL, both should be used in the generated tracking code refs #344

for plugins CI only run the UI job on PHP 5.5 and not php 5.6 (running UI test job twice has no benefit)

refs #3490 Throw meaningful error when userId segment is used with an unsupported segment match operator + test

refs #3490 removed segment definition as it apparently depends on idSites which I do not quite understand why

Allow .contains assertion to be used in screenshot tests as first assertion and allow .contains to be chained w/ .not property.

Refs #6078, fix column ordering bug, if 0 is used as pivotted table column, it is ordered first and not prepended.

Refs #6078, if pivotBy is used in request for HtmlTable visualization data, set columns to display to all available columns.

Refs #6078, set default of pivot_by_column to empty string so it doesn't get sent in AJAX requests when not set.

refs #6231 When a line is for a file with a known download extension and the user has specified --download-extension,
then any file with an extension not in the list will see its log line skipped

Adding new PivotByDimension DataTable filter that can pivot a report by (almost) any dimension. refs #6078

Refs #6078, fix regression in last commit and only send one request to save viewdatatable params when un-pivoting.

refs #5933 we must specifically invalidate day reports so that monthly reports have a chance to be re-processed. added note in the API comment.

Refs #6078, fix sorting on pivot table columns when columns use   (use decoded entity in PHP and do not select columns using jquery selector in dataTable.js).

Refs #6078, make sure $this->dataTable is instance of DataTable before calling disablePivotBySubtableIfTableHasNoSubtables.

According to http://forum.piwik.org/read.php?2,113613,page=1#msg-113739
php_uname will not return full string as in the shell, so we must first read shell_exec output

fixes #5933  New $period parameter to the API call CoreAdminHome.invalidateArchivedReports refs #6116