Polynomial_Assembias_HOD_Quenching_Model now instantiates without bailing
So, I foolishly abused git commit --amend --no-edit. This caused a divergence between
my local copy and the copy on the aphearin fork. But the only difference
between the versions was simply that I included the assembias_HOD_quenching_model
in the __all__ call, so that the docs would be be built.
What I did was just type "git pull", as recommended by the git message that popped up
after I did the ammend, and checked "git status". Hopefully this will not cause problems.

Merge branch 'develop' of https://github.com/aphearin/halotools into develop