PowerShell Module Improvements

[gerardog]

Improvements to gsudo PowerShell Module:

• The Wix (msi) installer will deploy PowerShell gsudoModule to '%ProgramFiles%\PowerShell\Modules\gsudoModule', so Import-Module gsudoModule does not requires an absolute path anymore
• The Chocolatey installer also will deploy PowerShell gsudoModule to '%ProgramFiles%\PowerShell\Modules\gsudoModule'
• The module version number is now properly updated with the build version.
• Updated docs to suggest Import-Module gsudoModule instead of the absolute path.