- renamed code coverage tests units to new structure
- removed processed system test files from git, added to .gitignore

we will deprecate old test classes in 4 months and not in 2, simplified test run by only allowing short version, added some examples

Add isSubmitting property to piwik-ajax-form directive and make sure child elements can access scope.

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