Install-RequiredModule to support RequiredModules.psd1

[Jaykul]

Can I send a PR for a Install-RequiredModule command that handles the syntax suggested by PowerShell/PowerShell-RFC/pull/185 ...

Specifically:

• a RequiredModulesFile parameter defaulted to RequiredModules.psd1
• support installing a group of modules listed in said file
• supporting NuGet version (range) syntax
• supporting specifying feed urls per resource
• with the option to install (save) locally (to folder) or to scope

If I did, would it be a problem if it required the Nuget.Versioning assembly (to guarantee the version range parsing is the same)?

[SydneyhSmith]

@Jaykul we don't see any problem with this--go ahead and submit a PR--Thanks!

[SydneyhSmith]

Closing as this is resolved by additional file options for Install-PSResource