Correct KerrBL::circularVelocity()
Correct also the generic implementation of circularVelocity()

Conflicts:
	lib/PolishDoughnut.C
Release 0.2.2

Signed-off-by: Thibaut Paumard <paumard@users.sourceforge.net>
Release 0.2.3
    * Fix minor memory-management bug in yorick-gyoto_Scenery.C

Signed-off-by: Thibaut Paumard <paumard@users.sourceforge.net>
Merge branch 'stable'

Conflicts:
	NEWS
update NEWS, which was left behind when releasing 0.2.3
Merge branch 'stable'

Conflicts:
	NEWS