- removed static definition
- use emplace_back instead of push_back
- changed the c++ deprecated headers
- removed some redundant std containers initialization in the destructor
- removed redundant .clear call for the std containers in the destructor
- added some const reference for some std container parameters
- other small changes in different places
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.