WIP - Add more thorough documentation for braintree.setup

[jeffcarp]

This is a work in progress to add documentation for every parameter that can be passed to braintree.setup. Currently I don't think there is a full list of options anywhere.

I realize this would be most useful if it also lived in the main docs site. I couldn't find a page where it would fit logically so I'm starting here.

TODO:

• paymentNonceReceived
• finish PayPal options

[jeffcarp]

Looking through our docs, the options for PayPal are all nicely laid out in this list, which makes me hesitant about duplicating them here.

Nonetheless, we are lacking a full client-side reference, so I'm going to go ahead and dupe that content here in hopes that it helps that initiative. I'll copy over any updates that happen in the meantime.

[pdg137]

This documentation is essential for anyone considering using drop-in, so I really hope that it will be merged into the official repository soon!

[jeffcarp]

Update on this PR: after launching the server-side reference, we're talking about how to improve the client-side references. I will keep you updated on how that progresses, but it looks like this work stream will end up being merged with a future improved client-side reference.

[aaronrenner]

Thanks for starting on this. It would be very helpful to have these options documented. I had to look through your pull request and the minified source to find the paymentMethodNonceInputField option. It would be really helpful if all of the options were documented somewhere.

[sornon1]

@aaronrenner all the options have been documented now in the public docs site. The global stuff is here and that particular option is here.

The team would love any feedback on the reorganization of the docs there.