Updated README to reference jsxcs where relevant.

Hi @bjyoungblood. Thanks for getting this project going.  I wanted to help but I don't have any experience building sublime text plugins.  I fixed up the README to reference jsxcs where relevant.  I'm assuming this will use https://www.npmjs.org/package/jsxcs.

When are you expecting to launch this package?  Let me know what I can do to help.

Cheers