Add ECMAScript Test Suite (Test262)

[viceice]

This project should add all ECMAScript Test Suite tests like Jint to verify compatibillity.

[lahma]

I'm currently building .NET version of the harness that should allow reuse between engine implementations.

[viceice]

Cool, I'm will to try to add this to my https://github.com/viceice/dotnet-ts-testing repo.

Let me know when there is something ready to be used