Fix missing dependency when not installing globally via npm.
Fix missing dependency when not installing globally via npm.

js-yaml is required, at least with node v0.12.6 and v4.0.0, but dev
dependencies aren't installed when doing something like:
  npm install indian-ocean --save

Afterward, even a basic require('indian-ocean') fails when js-yaml is
not found.  Tested without js-yaml installed globally.
//  Basic example that will fail:
  var util = require('util');
  var io = require('indian-ocean');
  console.log(util.inspect(io));
//

Also npm complains because chalk was listed in both normal and
dev dependencies.  It ignored chalk ^1.0.0 from dev, so that was
removed, leaving only ^1.1.1 from 'dependencies' to use instead.

akanik/indian-ocean,mhkeller/indian-ocean,jasonevrtt/indian-ocean,jasonevrtt/indian-ocean,akanik/indian-ocean