Option to enable the RASCMAK feature if necessary on Windows 8

-This adds the ability to install the RasCMAK Windows feature by running
the command Dism /online /enable-feature /featurename:rascmak.
-The installer tries to detect if it is running in a 64bit system and,
if yes, tries to invoke the correct Dism and not the WOW64 one.
-The installer warns in case the system is Win7 or earlier, in which
case the RasCMAK windows feature isn't needed.