- fixed GL context crashes for Linux / GLFW 3.0 - refactored CLI arguments parsing - minor code style cleanups
- fixed GL context crashes for Linux / GLFW 3.0
- refactored CLI arguments parsing
- minor code style cleanups

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