REF: Rename jac -> score_obs. Closes #1785.
Don't merge this yet.
My guess is that this might break some user code. I need to check if we need to keep jac as alias, which I thought we do.
Coverage decreased (-0.0%) when pulling 5c41b60 on jseabold:jac-rename into 0529da7 on statsmodels:master.
MAINT: Deprecate jac methods.
I deprecated it. Need to add to release notes, but I suspect they'll need a lot of work anyway.
Coverage increased (+0.01%) when pulling 0f24c10 on jseabold:jac-rename into 0529da7 on statsmodels:master.
Looks good to me, shouldn't cause any compatibility problems