API documentation missing information on available global and command options.

[tkodev]

Such as --cwd and --config

Again, this is specifically for the API:

var Hexo = require('hexo');
var hexo = new Hexo(process.cwd(), {});
hexo.init().then(function(){
  hexo.call('generate', {}).then(function(){
    // ...
  });
});

and etc. The options used for the command line version exist for the javascript API version or am I confused at the usage of the API?

[tkodev]

Moved from hexojs/hexo#2416