v0.8

Changes:

• Add version information
  • Add --version command line argument
  • Add version command to the nuqql conversation
• Backend changes:
  • Change expected names of python backend executables to nuqql-based,
    nuqql-matrixd, and nuqql-slixmppd
  • Do not run nuqql-based by default any more
  • Disable additional message history in python backends
• Improve backspace and quit handling
• Improve LogWin zooming and searching
  • Add jumping and zooming from InputWin with F9
  • Search for next match with F10
• Rename nuqql.py helper script to run.py
• Add setup.py for installation and package distribution
• Move nuqql-keys into the tools/ subfolder and install it as nuqql-keys
  with setup.py
• Add python type annotations
• Fixes and improvements
• Requires nuqql-slixmppd v0.5, nuqql-matrixd v0.3, or purpled v0.5