Fix drawShoot to not use a lot of memory
(#343)

Conflicts:
	galsim/base.py
Remove debugging edit
(#343)
Enable GSParams to set the previously-termed Magic Numbers dynamically
(#343)

Conflicts:
	include/galsim/SBAiryImpl.h
	include/galsim/SBDeconvolveImpl.h
	include/galsim/SBLaguerreImpl.h
	include/galsim/SBShapelet.h
	src/SBBox.cpp
	src/SBDeconvolve.cpp
	src/SBExponential.cpp
	src/SBGaussian.cpp
	src/SBInterpolatedImage.cpp
	src/SBKolmogorov.cpp
	src/SBLaguerre.cpp
	src/SBMoffat.cpp
	src/SBSersic.cpp
Add unit tests of using GSParams
(#343)
Add docs about GSParams
(#343)
Update docs about gsparams wrt wrapper classes: Add, Convolve, Deconvolve
(#343)
fixing a random typo
(#343)
Use new gsparams object for alias_threshold needed by OpticalPSF
(#343)
sterner warning
(#343)