1.2.3:
    - First release from gitlab
    - Fixed open-terminal example extension (Maximillian Schambach)
    - Fixed invalid DOAP file category (Andre Klapper)
    - Fixed bug #3, setting argv[0] to thunar
    - Fixed bug #4, allow overriding the build date to enable reproducible builds
    - Removed build warnings (Christian Stadelman)
    - Fix to work with python 3.8 (stratakis)