Convert to a Babel plugin

[sebmck]

This is WIP. There are currently ~8 failing tests so I thought I'd put it up for review before I look into them too much. This will heavily improve Babel performance and stability. I know there are ways for regenerator to perform it's compilation in a single pass in the future too (right now there are a few visitors that are ran independently).

NOTE: This wont currently run unless you've got a development branch locally checked out and everything linked which is a bit of a PITA.

AFAIK this was 👍 between @benjamn and @amasad.

TODO:

• Add back includeRuntime option.
• Add back regenerator.transform API.

[benjamn]

Great, glad to have a chance to look this over sooner rather than later.

Two first thoughts:

• Is there anything you can do to get the Travis tests to run, even with failures? Right now they're just erroring out at npm install time.
• Is it going to be possible to provide a require("regenerator").transform function that operates on an AST object, rather than taking in a string and returning a string?

[benjamn]

Removing the require("regenerator").transform API is a pretty big breaking change for any non-Babel consumers of this library.

[sebmck]

@benjamn

1. Is there anything you can do to get the Travis tests to run, even with failures? Right now they're just erroring out at npm install time.

I'll get out a release candidate ASAP so Travis at least shows the errors and you can run this locally without mucking about.

1. Is it going to be possible to provide a require("regenerator").transform function that operates on an AST object, rather than taking in a string and returning a string?

Yeah. Shouldn't be a problem. I'll add a TODO list.

[sebmck]

cc @benjamn. What's required to move this forward? Would like to get this merged ASAP.

[benjamn]

Implemented by #259.