simplify SersicTool and one_ring_test
fix slow version of SersicTool
tweak scatter plot settings
change ring test output plot markers
add some more information to the photon landings plot
update paper plots
Add measure_shear_calib to utils
updated one_ring_test and ring_vs_z dependence on measure_shear_calib
removed toy_PSF_correction
Merge branch 'galtool_refactor'