Code was assuming that FRAMEWORK_DIR would always have a value. If it
doesn’t (because you’re running a test instance of a naked framework)
This caused URLs to be treated as root relative, which creates some
duplicate-inclusion bugs.
The use of ltrim() works, but is a bit clumsy. A more flexible approach
to including front-end assets of given modules would be preferable;
ideally something that also let you keep your code outside of the
web root.
The 'admin' module will be split off from 'framework',
where 'framework' only provides (mostly) frontend-agnostic PHP classes.
For example, HTMLEditorField.php has a TinyMCEConfig.php driver,
but doesn't come with its own JS includes.
