typo
(#364a)
Minor docstring edits
(#364)
Get rid of config pix item.  Introduce draw_method=no_pix to do what pix : None used to do.
(#364)
Allow OffsetWCS to be drawn when image is None
(#364)
Have local WCS classes be written to header natively
(#364)
Fix writing header with scale == None
Reverse the sign of the definitional shear of a ShearWCS
(#364)
Only apply shift to WCS if delta != 0,0
(#364)
Let python handle position +=, *=, etc so python ops act more like python ops normally do.
(#364a)
Fix error in lensing interpolation that got missed because tests used to use grid_spacing=1.
(#364a)
Merge branch '#364a' into #364

Conflicts:
	galsim/fits.py
Update demos and config to use WCS objects
(#364)
Change image_origin param to just origin
(#364)
Switch UncorrelatedNoise from using pixel scale to using a local wcs
(#364)
Have config wcs work in the normal way with types and then using cls._req_params, etc. to determine the parameters.
(#364)