Merge pull request #849 from ghorn/haskell

haskell bindings: put modules in WriteCasadiBindings module
Fix problems with compilation (2)
Merge branch 'haskell' of github.com:casadi/casadi into haskell
Haskell interface: adding class inheritance to export
Merge branch 'haskell' of github.com:casadi/casadi into haskell
haskell bindings swig crawler: don't export methods from base classes