Attempt jQuery removal

[jondot]

Goal is to provide a more lightweight bundle size, one less dependency, and to use Velocity's built-in capability instead of jQuery's.

Challenge is to find and separate dependencies from tweene and tweene-velocity which treat jQuery as a global dependency and relies on jQuery plugin system.

This is motivated by #17, #16, #11

[jondot]

Updates:

Who's depending on jQuery:

• velocity
• tweene-velocity

What's been attempted:

• Complete removal, swapping basic jQuery functions with vanilla ones and shims from Velocity. Result: jQuery queues, data are still needed.
• Swapping jQuery with a custom build of Zepto. Result: jQuery queues are still needed

Current options:

• UPDATE: make tweene a module that takes a jquery module at run time, so that we can require it and internalize jQuery
• Continue on Zepto direction
• Build a minimal jQuery from jQuery itself, and inject it in once no jQuery has been detected.

I've also learned that due to nature of velocity/tweene it is discouraging to actually modify their code to remove jQuery completely (or in Velocity's case, jQuery shims).

[jondot]

Updates:

This task is now done in the jquery-sectomy branch. You don't have to explicitly have jQuery in your project any more.

You can try it right now by doing:

$ yarn add react-flight@next

Or by using any of the updated samples.

Implementation notes:
With that said, I opted not to really remove jQuery (see analysis above), but to make sure all dependencies are good citizens and can use an internally required jQuery version. We're also using jquery-slim, for what its worth.

I'll be waiting for feedback :)