Only run Windows builds on node 0.11

They take extra time and for some reason the error messages are worthless
on the node 0.10 builds. Ideally, this shouldn't have to be disabled, but
let's do it like this for now.
Merge pull request #60 from pereckerdal/only-one-windows-build

Only run Windows builds on node 0.11
Make sure stdout/stderr are fully drained before exiting a test

Ugly ugly hack workaround for node bug in Windows.

I don't know how to test this really. There are other tests that actually fail
before this fix so I guess it's kindof alright to go without extra tests.