overhaul of install script\n\nadds cmd line flags to enable/disable various features. code restructured into class with memebers
additions and restructure.\n\n- extra gaffer python snippets\n\n- shader example now comes directly from file\n\n- adds image of parameters in gaffer
updated for new way of setting layout\n\nalso, gfr file now doesn't redundantly serialsie (consequence of opening and saving script)