Add OneGet

Windows 10 will include a package manager OneGet, here is a Scoop manifest to get the latest "nightly" 
* This most likely will need some tweaks as the PowerShell module version changes I'm not sure if `Import-Module` will actually update the module.
* Some resources about OneGet if your curious [Hacker News](https://news.ycombinator.com/item?id=8524919) [Twitter @PSOneGet](https://twitter.com/PSOneGet)
* As OneGet is fully extensible a plugin could be written to include Scoop as a "Package Provider"