Print full output from 'browsers' command

Print full output from browserstack browsers:

````
{ version: '0.2.2',
  browsers: 
   { 'Samsung Galaxy S': 
      { type: 'device',
        os: { android: [ '2.2' ] },
        latest: { version: '2.2', os: [ 'android' ] } },
````
instead of:

`````
{ version: '0.2.2',
  browsers: 
   { iPad: { type: 'device', os: [Object], latest: [Object] },
     'iPad 2': { type: 'device', os: [Object], latest: [Object] },
````