Add tests about es5-shim

[kossnocorp]

I was started work on tests in my fork:

https://github.com/kossnocorp/es5-shim

[kriskowal]

Is your fork ready to review?

[Raynos]

@kriskowal I found this project

https://github.com/cms/es5tests

You should be able to incorporate those tests.

[lifesinger]

@kriskowal:

I recommend the test cases from v8:

https://github.com/seajs/dew/tree/master/src/es5-safe/test

The es5-safe.js module only contains the safe part of es5 shims. Hope it will be a little helpful to you.

[kriskowal]

I've landed two sets of tests. They should be consolidated; I'm presently using the Jasmine ones for regression tests.