rbiswas4/sncosmo_nestlc — pull request #1 by rbiswas4 (2014-09-30 20:18:50+00:00)
Title: Nestedchange

Added modelcovariance to nested routines. I think two further changes should be done:
1. we should make modelcov=True the default
2. Routines like _chisq should not have a default value of modelcov, and should use the value of modelcov
specified by the routines like chisq. If this is not convention we want to follow, I should change _nestlc