Added maybeT dependency
bumped version to 0.3
Added Errorable instances to other monads.
Yes, they are orphan instances. No, I don't care.
I think the likelihood that the standard Reader/Writer/etc. monads
implement Errorable in their own land is low, and if they do then
just don't import Dangerous.Extensions.
Added applicative instance
Added 'dangerize' ~:: (Show s, Errorable m) => (Either s a) -> m a
Warnings now print to stderr
Execute now prints warnings, extract is like old execute
Exporting Errorable now
made the >>= more consistent between Monad and Transformer
Added haddocs, bumped version number for cabal
Bumped cabal version number for uploading to hackage
Removed extraneous imports, touched up .cabal
extracted from bookbuilder