Add bnd 2.2.0.REL

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Add READMEs for bndtools never officially released 2.2.0 and 2.2.1 versions

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Add bndtools 2.2.2.REL

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>