VA release version 2023a VA_v2023a

This marks the last commit using the old CMake build system based on VistaCMakeCommon

Version 2021.a

Version 2019.a

This is the first version of the ITADiffraction C++ library. Instead of using version tags like v1.0, we will include the year and increasing characters to ease reading the vague time stampt of the library version.