Merge pull request dotnet/coreclr#3356 from bendono/PowerShell
authorJan Kotas <jkotas@microsoft.com>
Thu, 25 Feb 2016 17:40:59 +0000 (09:40 -0800)
committerJan Kotas <jkotas@microsoft.com>
Thu, 25 Feb 2016 17:40:59 +0000 (09:40 -0800)
Validate PowerShell prerequisite. Update documentation. -- Issue dotnet/coreclr#3355

Commit migrated from https://github.com/dotnet/coreclr/commit/97545d6f772546e4737c112007d687c6fbc640b4


Trivial merge