Update wiki for 1.7-style API

[brettp]

All the tutorials are using wrapper functions to the old API. These will generate visible errors in 1.8.

[ewinslow]

Would it make any sense to move the tutorials into the documentation directory in svn? Seems like it would be easier to upkeep the docs if they're closer to the code.

[brettp]

If we put them in SVN we should come up with a way to easily link them with the existing documentation. With the documentation push from a few months ago I was looking into ways to integrate PHPDocumentor and Mediawiki. Considering the current state of documentation, I think it's more important to get docs written somewhere public, and then we can worry about how we expose them.

For this ticket specifically, we need to update the wiki because it's already being used and linked to.