First (failed) attempt at type objects

First (failed) attempt at type objects

See lib/Ctypes/Type.pm. Tried to use tie'ing for FETCHing and
  STOREing Type values. 2 problems:
  a) trying to encorporate all in same class is complex
  b) FETCH seems to set its tied var to the value returned
Going to try to fix b) by using overloading instead, then look
  at a) again.

	modified:   Ctypes.xs
	modified:   lib/Ctypes/Type.pm
	new file:   t/types.t