installer module:

installer module:
	* fix some module imports (comtypes.client is needed, not just comtypes, and _winreg is needed).
	* Make sure to use dynamic displatch for wScript.shell so that comtypes does not needlessly generate typelib code.
	* createShortcut: only set a particular value on the shortcut object if its actually been given (not None)
	* hardcode the "userConfig" directory for exclusion from program file copying if it exists, rather than trying to use globalVars.appArgs.configPath as when run from slave this is not set.
	* The uninstaller display name should be  the name "nvda", not the version.
	* Fix some case typos (installDir, getDocFilePath)
	* fix typo when looping through uninstallerRegInfo (we need the values as well).
	* fix arguments for _winreg.DeleteKeyEx
	* unregisterInstallation: fetch the start menu folder chosen at install time from the registry.
	* install: fix typo of runAtLogon argument.