Also, the final version of the system will not require the `gettext`
extension for PHP

Also add several lint fixes for packaging

Including adding support to the TCL uninitialized variable reader to ignore
class-static variable access as well as detect inline functions and their
closure arguments.

Add stubs.php to include stub classes for built-in PHP classes used
throughout the code. This will allow the testing suite to verify that a
method exists, albeit not in our codebase