[C2hs] ANN: C->Haskell 0.13.2

Version 0.13.2 fixes a couple of bugs, adds a directive --output-dir (or -t) to specify the directory where all generates files go[1], and generally cleans up the method used to determine where generate files are stored. More at http://www.cse.unsw.edu.au/~chak/haskell/c2hs/docu/c2hs-8.html#ss8.1 Manuel [1] Thanks to Volker Wysk for the suggestion.