add centroid() to ChromaticObject
(#564)
add tests for ChromaticObject.centroid()
(#564)
use centroid() for DCR Rbar test
(#564)
SED.calculateFlux() uses np.trapz if *either* Bandpass or SED defines wave_list
(#564)
Merge branch 'master' into #564
use fewer evaluateAtWavelength() calls in ChromaticObject.centroid()
(#564)
Fix a galsim.integ documentation error.
(#564)
Merge branch '#564' of https://github.com/GalSim-developers/GalSim into #564
Merge pull request #565 from GalSim-developers/#564

#564