rm unused DFs
throw warning if progenitor's coordinate-transformation parameters differ from those given to streamdf, fixes #189
start on some StaeckelGrid tests
switch to a log grid in energy
change default nLz
deal w/ NaNs
further tests of actionAngleStaeckelGrid
tweaks to the actionAngle tests to test more different kinds of inputs
tweaks for further testing
test outside-the-grid evaluation
test w/ multi setup
do not cover exception
tests of actionAngleStaeckel w/ u0 input
addl tests of actionAngleStaeckel
further tests of actionAngleAdiabatic