Update README.md

updates copied from deliberation-ruleml
Update README.md

added ref to Github Demos on wiki.
Update README.md

reorganized, added prereq
Top-level files moved into 0.91 (not under version control), which is also copied into 1.0 (under version control).
Deleted outdated .xml and .html files prior to 0.91.

Signed-off-by: Harold Boley <harold.boley@ruleml.org>