Merge pull request #1 from lpw25/master

Rewrite the multiple inheritance examples
Merge pull request #2 from lpw25/master

Avoid warnings for shapes.ml
maps and hashtables updated
fixed async examples
use ascii mode of core_bench
Merge branch 'master' of git://github.com/realworldocaml/examples
fix conflict_interfaces script to not have prepending $
fixed bench results
more -ascii flags