refs #32: sinogram padding for gridrec is corrected.
Changed tiff writing to use Christoph Gohlke's tifffile.py
Merge pull request #33 from gazzar/master

Changed tiff writing to use Christoph Gohlke's tifffile.py
Merge branch 'master' of https://github.com/tomopy/tomopy into develop
tiff reader added
refs #33: uint16 and  uint8 save options is added (with correct scaling)