fix tarball (dragonegg missing in llvmPackages on darwin)
pango on darwin: amend the wrong fix

I didn't realize pango doesn't depend on flex directly,
only through introspection which caused build problems by itself, too.
Offer consistently named attributes for the two available flex versions.
maude: use old flex version; the new one causes build errors

This issue has been fixed in the latest alpha release.
all-packages.nix: drop trailing whitespace
haskell-parsers: add version 0.11
haskell-statistics: add version 0.11.0.0
haskell-active: update to version 0.1.0.12
haskell-cereal-conduit: update to version 0.7.2.1
haskell-diagrams-contrib: update to version 1.1.1.3
haskell-diagrams-lib: update to version 1.1.0.6
haskell-diagrams-postscript: update to version 1.0.2.3
haskell-dual-tree: update to version 0.2.0.2
haskell-hxt-unicode: update to version 9.0.2.2
haskell-hxt: update to version 9.3.1.4
haskell-monad-logger: update to version 0.3.6
haskell-monoid-extras: update to version 0.3.3.2
haskell-texmath: update to version 0.6.6.1
haskell-yesod-core: update to version 1.2.12
haskell-HTTP: update to version 4000.2.12