Add Windows Build

[brthor]

Leaving this issue to track adding a windows build to the current build matrix.

The primary issue here is running an updated instance of redis on windows with which to test against. Having tried multiple methods, I do not believe this is currently possible on travis.

1. LCOW containers cannot be run on a travis instance. (Ultimately ends up with no hyper-v support).

2. Redis for windows is very outdated.