Object.getPrototypeOf should return null when the parameter is Object.prototype
Merge pull request #26 from normanzb/fix/get-prototype-of-return-null

Object.getPrototypeOf should return null when the parameter is Object.prototype
Merge pull request #20 from jaredcacurak/dev

Introduce ES6 Array.prototype.find and Array.prototype.findIndex to poly
Rename arra-find to array-es6 in preparation for a few more functions.
Add Array.from and Array.of
Update copyright/license headers and bump version.
Move isArray test to _base
Make Array.from() generic. (Note: spec only allows it to be applied successfully to constructors that take a single length argument.)
Update README with new features and release notes.
Fix a few typos.