Changed implementation of E(B-V) smoothing for individual
stellar probability surfaces. Smoothing is now dependent on both
E(B-V) and the pixel nside. The user can specify how the
coefficients that control % smoothing in E(B-V) change with
pixel scale through the options --smoothing-pct-coeffs and
--smoothing-pct-max.
Merge branch '2MASS' of github.com:gregreen/bayestar into 2MASS