__proto__ deprecated, replaced by #setPrototypeOf

[calvintwr]

Checklist

• [X ] I have read the CONTRIBUTING guidelines.
• [X ] I have added test cases which verify the correct operation of this feature or patch.
• [X ] I have added documentation pertaining to this feature or patch.
• [X ] The automated test suite ($ make test) executes successfully.
• [X ] The automated code linting ($ make lint) executes successfully.

[coveralls]

Coverage remained the same at 98.88% when pulling 3244e44 on calvintwr:patch-3 into 1fd591d on jaredhanson:master.

[calvintwr]

Travis failed on node 0.10. #setPrototypeOf is only supported from 0.12 and up. Suggest dropping support for 0.10. And also in package.json, node support is listed as 0.4.