Add grub checking if exists.  Move resizable images to the same procedure used for linux resizable imaging.  Maintain legacy imaging as well basically using only the file sys.img.000 existant to check if the file is of legacy methods to image.  Will need to adjust multicast for this as well.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2263 71f96598-fa45-0410-b640-bcd6f8691b32