refs #5940 moved files into a subfolder framework, added autoloader to remove duplicated code to load autoload.php and to be able to register more autoloaders (eg for test files) on demand. This I got read of many includes that had to be updated all the time and that had to be updated all the time when moving iles

refs #5940 we might stay backwards compatible this way for 2 months. moved some tests from unit to integration and explained when a test is a unit test, an integration test or a system test.

refs #5940 put tests in correct folders, better testsuite names, some tests still fail and I cannot figure out why

Piwik is a free/libre analytics platform. Refs #4455 GNU Package requirement to use free/libre instead of open source

- Make 'idsite' parameter in certain Overlay URLs 'idSite'.
- Make sure Overlay sidebar has width so screenshot test framework can find position.
- Add overlay test site so Overlay can be loaded in phantomjs.
- Remove createSuperUser call from TrackerTest (done in Fixture setUp).
- Make sure piwik.js link is created for screenshot tests & make sure the test environment JSON file is loaded after the database is setup.
- Modify logic that waits for images to load in screenshot testing framework's page renderer to wait for CSS image URLs.

Speeding up tests on travis by adding persist_fixture_data config option and modified screenshot capture script to automatically wait after sending each event.

Notes:

  - Modify DbHelper::createAnonymousUser to add only if user does not already exist.
  - Allow config to be overridden by file in tmp dir during tests.

- Rename *_BaseFixture to Fixture.
- Move DB setup code to Fixture and reuse code in DatabaseTestCase.
- Make IntegrationTestCase::$defaultApiNotToCall an instance var.

Thanks for the report, we didn't catch this failure as it wasn't properly continuously tested!