Add Haskell solution to problem 8
Add Haskell solution to problem 9

It's simple, but really slow.

    haskell> time runhaskell pe009.hs
    [(200,375,425)]
    107.91 real       107.44 user         0.54 sys
Speed up Haskell solution to problem 9
Add Haskell solution to problem 10

Like #9, this is simple but slow.

    haskell> time runhaskell pe010.hs
    142913828922
    93.18 real        92.65 user         0.50 sys

I really need a better prime checker / generator.