doc: finish the doc of the core library
doc: finish the doc of the core library

Ignore-this: f7cf3d9b5188897db08fa152bace233d

darcs-hash:20100123160702-c41ad-c35cc923f0cb22069bd48b2f9c896defa905e205

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