Made ckeditor.js's src regexp testable and added support for URL params separation by semicolon.
Loader is never used without ckeditor.js which sets basePath.
Loading ckeditor_basic.js is not supported any more and ckeditor_source.js does not exist any more.
Removed outdated comment.
Tests: Fixed assertions.
Tests: Cleaned up leftovers.
Updated the docs related to minified code.
Changelog entry.
Merge branch 't/12215'