Template Panel Bugfix

[noahsilas]

The template panel breaks the context stack in django 1.2; the attached commits are my attempt at fixing it while retaining compatibility for django 1.1.

details:
The Template.render method became the Template._render method. The new render method performs some of the context stack functions, and replacing this function with the instrumented_test_render method means that template rendering can get real wacky.

I haven't been able to test this in django 1.1 - I think that it works, but someone should probably double check for completeness.

[noahsilas]

And, of course, too late I notice that you've fixed it in develop. Nevermind, and thanks!

[robhudson]

I think I need to add a note somewhere about the develop branch. It's relatively new. Would it have helped if there was a note in the readme?

[noahsilas]

Yeah, I checked out the readme, and if there had been a pointer to the develop branch I would have checked there first. Of course, now I know and will make sure that I'm working off of that branch if I'm troubleshooting again. :-)