I think that the project was doomed with this particular developer from the start, because it sounds like she doesn't really know how to program. 12 months for a Django website with nothing to show for it is insane.
My comments are mostly intended for bystander-readers who're thinking of doing the same thing - paying a technical developer a full salary + 1-5% equity to develop a product from scratch. There're a lot of people that still suggest that, and it really doesn't work, as you've found out the hard way.
I dunno what advice I'd give to you personally - it's a hard situation, as many others have pointed out. Probably cut your losses, chalk it up to an expensive learning experience, and move on, then try again some other time. As I mentioned in another comment, I think it's fairly unlikely that this developer left you usable code that someone else could pick up, so it'd be difficult to get a contract developer to push it to finish line. You could learn to hack yourself - Python and Django are not difficult - but it'd set you back at least a couple months, and then you'd still have to implement everything.
[Edit: last paragraph was on the assumption that her work was not even demoable, but rereading your post, it sounds like you've gotten to alpha but just need to incorporate the feedback in. If that's the case, a contractor might work, but be aware that it's harder to read code than to write code, and if the code quality is bad enough any contractor would just have to throw everything out and start from scratch.]
If you can find a technical cofounder, someone that you trust that you know is a good developer, I'd do that (and give the decent equity from the start!), and then they can probably write the whole site from scratch in a couple months. But it has to be someone you know well, someone whose skills you're sure about, because otherwise you run the same risk with them.
Agreed Javascript in itself is a whole different beast together. I would have considered encouraging Drinko to learn jQuery first but then if you don't know how to hack to begin with then that advice doesn't really count.
Agreed 12 months for a demoable web app is bad IMHO, unless you're writing avionics software(even that is a stretch) web apps aren't exactly rocket science to begin with. So you can chalk it up to developer inexperience OR she was doing work on the side. Which would probably explain why it took her 12 months to begin with.
My comments are mostly intended for bystander-readers who're thinking of doing the same thing - paying a technical developer a full salary + 1-5% equity to develop a product from scratch. There're a lot of people that still suggest that, and it really doesn't work, as you've found out the hard way.
I dunno what advice I'd give to you personally - it's a hard situation, as many others have pointed out. Probably cut your losses, chalk it up to an expensive learning experience, and move on, then try again some other time. As I mentioned in another comment, I think it's fairly unlikely that this developer left you usable code that someone else could pick up, so it'd be difficult to get a contract developer to push it to finish line. You could learn to hack yourself - Python and Django are not difficult - but it'd set you back at least a couple months, and then you'd still have to implement everything.
[Edit: last paragraph was on the assumption that her work was not even demoable, but rereading your post, it sounds like you've gotten to alpha but just need to incorporate the feedback in. If that's the case, a contractor might work, but be aware that it's harder to read code than to write code, and if the code quality is bad enough any contractor would just have to throw everything out and start from scratch.]
If you can find a technical cofounder, someone that you trust that you know is a good developer, I'd do that (and give the decent equity from the start!), and then they can probably write the whole site from scratch in a couple months. But it has to be someone you know well, someone whose skills you're sure about, because otherwise you run the same risk with them.