EXT : add tifffile.py and tifffile.c

source:
http://www.lfd.uci.edu/~gohlke/
ENH : Added draft of tifffile based sequence

 - untested, but should work
API : added close + context-manager magic to FramesStream

 - added no-op close method to FramesStream
 - added __enter__ and __exit__ functions to FramesStream
   so that all sub-classes are useable in context managers.
CLN : py3k + distutils import

 - reverted py3k breaking changes
 - import disutils from numpy
MOD : added __init__.py so extern gets recognized as a module
Merge pull request #46 from tacaswell/tifffile

Tifffile