Change name of applyScale to applyExpansion in SBProfile (matches correlatednoise, and is a better name methinks)
(#430)
Add applyDilation, applyMagnification, applyLensing to correlatednoise to do the right thing to noise when these ops are done to galaxy.
(#430)
Add whiten option to RealGalaxy in config
(#430)
Have applyShear, scaleFlux, etc. also do the right thing to the noise if there is one present.
(#430)
Add VariableGaussianNoise class
(#430)
Remove complicated padding options from RealGalaxy.  Now just 0's or the correct noise, according to noise_pad parameter.
(#430)
Bug fixes re VariableGaussianNoise
(#430)
Allow difference of GSObjects and CorrelatedNoises
(#430)
First pass at adding whitening to demo11
(#430)
Add whitening option to demo11.yaml -- not working yet.
(#430)
Try using real part of PS in correlated noise.  Not working.
(#430)
Go back to old way of calculating cf rootps
(#430)
Switch default RealGalaxy padding back to noise_pad=False
(#430)
Add rsub and rdiv to Image arithmetic
(#430)
Have whiten option automatically set noise_pad=True for RealGalaxy
(#430)
Enable whitening logic in config layer
(#430)
Have unit tests check whitening->noise_pad automatic value
(#430)
Get demo11.py and demo11.yaml match up in functionality (check_yaml now passes)
(#430)
Update demo11.json to match demo11.yaml
(#430)
Merge branch '#449' into #430

Conflicts:
	galsim/real.py