Merge pull request #24 from mor1/master

blog and wiki updates
Merge pull request #25 from mor1/master

trip report update
Merge pull request #26 from mor1/master

update wiki
[git] ignore ocamlbuild droppings
[intro] tweak front-page content
[wiki] update presentations/slides listing
[wiki] simplify index slightly
[papers] collate papers
[blog] note openflow details have changed
[wiki] remove page about developing for old network stack
[wiki] update lwt tutorial to new world