Alpha preview release of Docker PowerShell.

This release includes support for Windows PowerShell 5.0 and 5.1, as well as cross-platform PowerShell 6.0 (https://github.com/powershell/powershell).

The easiest way to try the module is to download the Docker.0.1.0.zip file below, unzip it, and call Import-Module on the resulting "Docker" folder. You can see available commands by running Get-Command -Module Docker.