Literate Haskell not supported

[zenzike]

It seems that Literate Haskell, as in .lhs files, are not supported. In lhs files, every line is a comment unless the line is prepended with a > symbol, or between lines that say \begin{code} and \end{code}. Additionally, code that should not be compiled but should be highlighted is indicated in a line that starts with <, or between lines that say \begin{spec} and \end{spec}.