Changed copyright end year to 2020 in every reference "Copyright (c) 2006-XXXX, assimp team".
Changed copyright end year to 2020 in every reference "Copyright (c) 2006-XXXX, ASSIMP Development Team".
Changed copyright end year to 2020 in LICENCE.rtf.
Changed copyright end year in CMakeFiles.txt files and any other places referencing Assimp with a copyright start and end year.
./assimp Added arguments --gs to assimp command line option to enable global scaling.
No scaling for mScale of 1.0.
Co-Authored-By: K. S. Ernest (iFire) Lee <ernest.lee@chibifire.com>