Dependency on PowerShell 3 and/or .NET 4.0

[christophercurrie]

I had difficulty running chewie until I updated to PowerShell 3.0, which appears to use .NET 4.0 by default (unlike previous versions). I don't know that PS 3 is required, it's possible that PS 2 would work fine if configured to use .NET 4.

Either way, please update the docs to note this dependency.

[idavis]

Where do you think it would be the most helpful? Failing on the command line? Wiki?

[christophercurrie]

Some ideas:

• The Chocolatey installer could fail if the system does not meet the dependencies
• The command line could print a helpful error message (right now, it just fails with cryptic error messages about missing methods)
• The video page might note the dependencies, since that's the current recommended "documentation." This would also be a helpful place to note that "cinst Chewie" as mentioned in the video won't get the right version, but "cinst Chewie -Pre" will.