The tests weren't complete nor were they being used so I dropped them. Since
this branch is still actively being maintained as it's the PHP 5.3 compatible
stuff I figured I should update the headers to have the current year and
explicitly show that it's PHP 5.3+ and not just PHP 5.
* Updated the documentation slightly
* Added PECL json 1.2.1 to the vendors directory to help out any poor unfortunate souls that aren't running PHP 5.2+
* Not sure the legality behind including PECL json, according to PHP License 3.01, it should be okay (it's not modified, and I haven't derived any code from it).
