2.2.1

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>
Prepare for next version

In 2.2.1:

Francis Galiegue (5):
      Prepare next version
      Main: default to loading schemas using the current directory as a URI
      Main: improve help
      Improve help for main
      2.2.1

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>