fix a comment in FarMeshFactory to reflect the changes in FarPtexCoord
fix a comment in FarMeshFactory to reflect the changes in FarPtexCoord

fixes #143

xldeveloper/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,poljere/OpenSubdiv,nyotis/OpenSubdiv,nyotis/OpenSubdiv,takahito-tejima/OpenSubdiv,xldeveloper/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,c64kernal/OpenSubdiv,takahito-tejima/OpenSubdiv,anshuarya/OpenSubdiv,jcowles/OpenSubdiv,takahito-tejima/OpenSubdiv,poljere/OpenSubdiv,shengfuintel/OpenSubdiv,lookup1980/OpenSubdiv,xldeveloper/OpenSubdiv,anshuarya/OpenSubdiv,jcowles/OpenSubdiv,lookup1980/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,jcowles/OpenSubdiv,shengfuintel/OpenSubdiv,nyotis/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,lookup1980/OpenSubdiv,poljere/OpenSubdiv,c64kernal/OpenSubdiv,shengfuintel/OpenSubdiv,c64kernal/OpenSubdiv,anshuarya/OpenSubdiv