removed arch specific img converter as there is no benefit to using the x64 version on x64. performance with x86 version is the same. (reduces script size and code processing)
optimized ImageConvert.exe code (exe size reduced by ~44kb!)
"default" wallpaper encoded as .jpg and converted to other formats as necessary. (reduces script size)
proper warning given if user chooses to change image format to jpg
added internal ability to configure the name of the wallpaper image ( %WallPaperFileName% var for dev testing, etc)
Improved Echo statements
cleaned up some code for faster script processing
version # advanced to v7 to sync with ChrisR's modified scripts
