andreagus/plp @ bb56291abb1ab2b92b279e5774407806d938b423

Andrea Gus 705f639e1a some work on maps and monads		%!s(int64=9) %!d(string=hai) anos
..
haskell1.hs	54159168f0 first exercises on haskell	%!s(int64=9) %!d(string=hai) anos
haskell2.hs	c49b53768b corrected an error in the trafficlight example	%!s(int64=9) %!d(string=hai) anos
haskell3.hs	705f639e1a some work on maps and monads	%!s(int64=9) %!d(string=hai) anos