powershell module install location parameter

By default the powershell module will be linked from
$HOME\Documents\WindowsPowerShell\Modules. To override this behaviour,
pass in the PSModuleDirectory parameter when installingthe package.

For example, to install the module system-wide:
choco install invokemsbuild -params 'PSModuleDirectory=C:\\Program Files\\WindowsPowerShell\\Modules'

NOTE: to uninstall the package you must specify the PSModuleDirectory
where the package was installed, otherwise the link will not be removed.