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.
Rearranged methods as well, they needed to be in alphabetical order. In the case that I need more distance related conversions, I'll move that method to it's own class.
I never use them, there's a link for the JSON one in the convert class if anyone really needed it. Mongo support's been dropped for a while so there was no need for that one either.
