lensing_ps.py docstring cleanup
(#526)
fix incorrect statement in base.py docstring
(#526)
base.py docstring cleanup - part 1
(#526)
expand statement in base.py docstring slightly for clarity
(#526)
base.py docstring cleanup - part 2
(#526)
config/gsobject.py docstring cleanup
(#526)
config/image.py docstring cleanup
(#526)
assorted other dox tweaks
(#526)