Add Travis, batches, coverage, cdn, umd build and such

[mweststrate]

• Travis added with f895e01 thanks @Gregjarvez
• batches
• test coverage
• cdn
• umd build

[Gregjarvez]

I've been researching what batches are but, It ain't kicking it. if you wanna give me a run down I can do that tonight ?. And coverage. test coverage? @mweststrate @benbraou

[benbraou]

@Gregjarvez yes it is about test coverage
what is done in https://github.com/mobxjs/mobx may help
For the rest, I let @mweststrate clarify

[mweststrate]

Yep, build, code style, coverage (run jest with --coverage and pipe it through coveralls works pretty great usually), donate badges would be cool. Gitter channel is not needed.

CDN is is simply the unpkg.com link.

Don't bother about the UMD / ESM builds yet, I first want to figure out what the best way is to export the library in the light of supporting different runtime platforms (with and without proxies, see #22)

[mweststrate]

Eh wait, CDN should link to the UMD build, so skip for now :)

[Gregjarvez]

Awesome. I will try and work on them tomorrow !. Thanks for the explanation @mweststrate @benbraou