Various bugfixes / result fixes

Fixed bugs in the String#contains and Array#[Symbol.unscopables] test.

Fixed some results for: TypedArray#copyWithin, Object.prototype.__proto__, __proto__ in object literals: not a shorthand method, Object.getOwnPropertySymbols.
Added Chrome 31 and Chrome 36, and fixed some results.

These releases only differ from their preceding version by 1 or 2 results, but are included anyway for completion purposes.

This also closes #239 and #227.