Deprecate functional interface to cosmology
update docs to avoid functional cosmology use
add changelog/what's new about deprecating cosmology functions
fix broken test due to deprecation being in `funcs` namespace
fix indentation typo in whatsnew
Switch to using new-style default_cosmology
Partially clean up the default/current discussion
Removed differential_comoving_volume convinience function
Whitespace sanitization
Removed age and comoving_volume functions that were added in dev but
never released
removed test accidentally left in
Merge pull request #2343 from eteq/deprecate-cosmology-funcs

Deprecate functional cosmology interface