Just load the jasmine methods directly from jasmine env

This should resolve #58.

Basically instead of creating a proxy to all the Jasmine methods, I just directly set all the methods on `env` to the `window` object.

I've manually tested this on my project for Jasmine `2.0.4` and `2.1.2` and it ran through all the tests fine.

Let me know if there are any concerns with this method.
It does.

https://github.com/jasmine/jasmine/blob/15ae0379ec862ea7f9608d9b57bafb302263e2a9/src/core/requireInterface.js

And with my changes, the `x` methods still work.