Edits to Memory allocation section.
light-weight -> native.
fix a typo and other work.
combining two paragraphs.
simplifying the explanation.
OS thread -> native thread.
just a wording.
Improve explanation of prefork and move to parallel IO manager.
Edits to smooth the "User threads" section.
Revise text that claims that GHC blocks all threads when a system cal…
…l is made.
Deleting a line according to #12.
Mention difference lists #13
Adding Andreas Voellmy as the third author.
Possible change for #13.
Possible change for #9
updating the benchmark graph.
brushing up explanation about parallel IO manager.
fixing explanation of benchmark.
updating benchmark results.
removing some FIXME.