Added listdirs and listfiles for Haskell
Added listdirs and listfiles for Haskell

clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch,clarkcb/xsearch