* add icons submodule

* replace path

* change submodule url

* fix JSONTest

* fix integration tests

* update icon submodules

* fix preg_match

* fix remaining system tests

* better match for non dist icon files

* fix .gitmodules

* update icon submodule

* Fixed custom dimension test

* Do not completely fail when GD not enabled

* Fix http test + refactor checklist

* Refactored the code into a method

* Changed icon path refs https://github.com/piwik/piwik/pull/11383

* System tests

* Update valid UI tests

* Fix integration test

* referrer tests

* Core system tests

* Log Analytics is compatible with Python 2.7

* Note

* Submodule

* UI tests: Gender neutral

* updated our font pack, use some material design icons

* fix sign in icon, better help icon

* fix ui tests

* fix more screenshot tests

* add legal notice and readme

* fix remaining  tests