added support for detecting big-endian data format in uintah particle parser
added support for detecting big-endian data format in uintah particle parser

ospray/OSPRay,Twinklebear/OSPRay,wilsonCernWq/ospray,MengjiaoH/ospray,favreau/OSPRay,ospray/OSPRay,favreau/OSPRay,wilsonCernWq/ospray,wilsonCernWq/ospray,ospray/OSPRay,MengjiaoH/ospray,favreau/OSPRay,Twinklebear/OSPRay,MengjiaoH/ospray,MengjiaoH/ospray,MengjiaoH/ospray,favreau/OSPRay,Twinklebear/OSPRay,ospray/OSPRay,Twinklebear/OSPRay