numerically stable method?
Merge branch 'master' of https://github.com/kjoyce/edge_psf_reconstruction

Conflicts:
	abel_transform.m
	test_abel.m

Merging with computer lab.
Merge branch 'master' of https://github.com/kjoyce/edge_psf_reconstruction

Conflicts:
	abel_transform.m

Merging computer lab changes.