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

Also add several lint fixes for packaging

Creates a regression test for the parsePriority function, as suggested by GreezyBacon https://github.com/osTicket/osTicket-1.8/pull/348#issuecomment-31326865

Allow tester to run single test by specifying it on command line: php run-tests.php TestMyThing etc.

Still works for normal tests.

Allow the php source analyzer scan for $this in static functions as well as
properly handle the exception variable inside catch blocks.

Use a PHP setup which uses the built-in PHP tokenizer to parse and traverse
PHP scripts to determine (possible) access to uninitialized variables

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.

Also, run the tests in the packager. The packager will automatically run the
regression test suite prior to packaging a release. The package will not
build if there is at least one fail from the regression tests.

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

Only use 8 bytes (64-bits) for the IV data (salt) for the encryption keys,
except for Mcrypt, which requires you to query the specific length and use
it specifically.