Add command for downloading/installing psake into the current workspace

[gep13]

@devblackops @rkeithhill what is the recommended best practice for doing this?

[rkeithhill]

Well, you wouldn't install the module to the workspace. For installation, you could use either PowerShellGet (if available) or Chocolatey. Then I guess the command could create a psakefile.ps1 if it didn't already exist.

[gep13]

You may want/need to install to workspace if you wanted to use a specific version of psake on a project, rather than the globally installed one. No?

[rkeithhill]

You can have multiple versions of the same module installed side-by-side globally. So the workspace specific bit could simply be the required version number. Is there an extension setting for the version of psake to use? If not, maybe we add one? I would imagine it would take latest as well as version numbers like 4.7.0.