Added support for jshint extends option

[hacker112]

Added the extends options according to: jshint/jshint#1314
Implemented in the cli.js of the command line version of jshint in loadConfig on line 532:

  if (config['extends']) {
    var baseConfig = exports.loadConfig(path.resolve(config.dirname, config['extends']));
    config.globals = _.extend({}, baseConfig.globals, config.globals);
    _.defaults(config, baseConfig);
    delete config['extends'];
  }

[cfjedimaster]

Thank you!

[hacker112]

Well thank you for letting me participate :-)

[miqmago]

Cool option!
Is there any possibility to extend "jshint.globals" under "Debug > Open Preferences File" with this option?

I've tried with

{
    "extends": "",
    ...
}

with no success (in fact I'm getting Bad option: 'extends')