fixed bugs within the assignment rule.
added '+=' and '-=' assignments.
assignments must now end with a semicolon.
added assignment like "off = on".
enhanced the 'list <fluents/facts>' rule's output.
added var assignment (for testing), like "$n = 1".
basic action_exec with simple atoms and
assignment work.
downgraded antlr-runtime to 3.3.
first 3 formula rules works now.
first atom rule works now.
added atom's rule 4. and 5. (true and false)
added atom rule 3.
Merge branch 'master' of https://github.com/thensgens/yagi-vm