Few small fixes to wrapping code and tiny debug print suppression.

1) All generated calculate.[sh|bat] files should now have proper
   permissions (assuming Scons works as advertised).
2) For python wrapper, hard-coded library name rather than rely
   on (poorly documents) ctypes.util.find_library, should fix
   problems with loading the library. (details: turns out load_library
   doesn't look in (DY)LD_LIBRARY_PATH, so it won't find the library
   anyways.).
3) Small debug statement emitted when specified hand contains one
   or more dead cards was not properly suppressed when VERBOSE was
   not set.