Update of 3D Cab to allow using other cvf file, which should be in the same directory (CABVIEW3D) as the .s file, with the same prefix (i.e. if the file is Cab3D.s, the cvf should be Cab3D.cvf).
Working in progress to improve gauges.
Fix a bug for showing digits in 3D cab.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@2865 a9f3cfff-6c41-7446-b0ca-052bd761e6eb