update licence file (add text of BSD license)
update licence file (add text of BSD license)

Ignore-this: a37ca9575a944ea3715a1427579c96d

darcs-hash:20110713170350-0cb73-b3bd6d3cc543bc88642c3025946560e1f5695af5

c-cube/lwt,ocsigen/lwt,ocsigen/lwt,mirage/lwt,fdopen/lwt,mirage/lwt,mfp/lwt,rgrinberg/lwt,janestreet/lwt-async,rneswold/lwt,mfp/lwt,rgrinberg/lwt,ocsigen/lwt,gfxmonk/lwt,rneswold/lwt,rneswold/lwt,c-cube/lwt,rgrinberg/lwt,rgrinberg/lwt,fdopen/lwt,janestreet/lwt-async,c-cube/lwt,gfxmonk/lwt