Volumetric Shadow Demo 1.6.0

Rob (silent_code) has released another update to his NDS tech demo program, this version features several updates. He says this may be the final version, but plans to replace this program with VSD 2.0 in the future.QUOTE(Changelog) - Fixed the tutorial (thanks to zeruda!) :^) - Fixed a typo in the readme (thanks to jello!) ;^) - Updated the readme. - Cleaned up console initialization and propper use of libnds' definitions. - Fixed material / lighting bug. - Added and fixed come source comments. - Fixed initialization function. - Fixed the view class and its usage. - Replaced the floating point gluPerspective() whith its fixed point