Break out test_draw stuff into their own file
(#426)
Break out some of the helper functions into galsim_test_helpers.py so they can exist in just one place even when multiple test files use them.
(#426)
Break out the various transform tests (shear, shift, rotate, etc.) into their own file
(#426)
Break out the convolve, add, etc. tests into test_compound.py
(#426)
Move test_sbinterpolatedimage to test_InterpolatedImage.py
(#426)
rename test files to lowercase to make consistent with most of the other files
(#426)
Finish rename procedure (workaround for apple's not-really-case-sensitive file structure
(#426)
Remove some files that haven't ever been used or needed.
(#372b)
Move test_gsobject tests into more appropriate files
(#372b)
Merge pull request #428 from GalSim-developers/#372b

#372b Some file rearrangement in the test suite
Merge branch 'master' into #420

Conflicts:
	tests/test_SBProfile.py
Simplify some of the Sersic unit tests
(#420)
Add more checks that sersics return the right HLR, SR, flux in different situations
(#420)
Merge branch '#420' of github.com:GalSim-developers/GalSim into #420