[WIP] ES6 lazy rewrite

[battousai999]

This is a rewrite of the library using ES6. This should allow the Linq operators in the library to finally be lazily executed (just as the .NET Linq to Objects are).

[david-pfx]

Is this still a work in progress?

[battousai999]

@david-pfx Yeah, while the code changes are finished, I am still working through demonstrating (to myself) that I can get it running in a node.js application. I'll probably also perform some performance comparisons between the version in this branch and the version in master before calling it done.