jshint/jshint — pull request #1979 by sebv (2014-11-16 16:59:34+00:00)
Title: Added optional asyncawait option on top of esnext.

Seems to work, passes the test suite, works well with arrow function and classes.

use the following options:
```
"esnext": true,
"asyncawait": true
```

To try it:
```
npm install -g -f https://github.com/sebv/jshint/archive/esnextnext.tar.gz
```