Currently this only reads universal branches. The parser (and the
automaton code) do not support universal initial states.
* spot/parseaut/parseaut.yy: Read universal branches. Deal with
the no-univ-branch/!univ-branch change in HOA 1.1.
* tests/python/alternating.py: Read the output of print_hoa.
* tests/core/parseaut.test: Adjust test output, and add more tests.
This is so that we can have -d as an alias for --dot everywhere.
* bin/randaut.cc: Rename -d as -e.
* NEWS: Mention the change.
* doc/org/autfilt.org, doc/org/oaut.org, doc/org/randaut.org,
tests/core/parseaut.test, tests/core/readsave.test: Adjust.
