Update to 0.4.1.1

changes:
0.4.1.1
  Bump unix upper bound for GHC 7.7
0.4.1.0
  Fixed build issues with 64-bit GHC on Windows
0.4.0.0
  Support directory 1.2
    This also involves a conditional migration to the new "time" package
  fix Windows build with GHC 7.6: import data constructors of FFI types
0.3.0.2
  Bump `unix` version constraint to allow GHC 7.6.0 RC1's `unix-2.6.0.0`