test the handling of KeyboardInterrupt in save_pickles
add documentation on interpRZPotential, fixes #153
tests of array input for DoubleExponentialDiskPotential
test RazorThinExponentialDiskPotential's PotentialError
add pretty potential for SteadyLogSpiralPotential, #168
add pretty potential for TransientLogSpiralPotential, #168
potential formatting for cosmphi potentials, #168
potential formatting for Dehnenbar, #168
note about growth
potential formatting for BurkertPotential, #168
density formatting, #168
density formatting for twopower potentials, #168
potential formatting, #168
density and potential formatting, #168
potential formatting for LogarithmicHaloPotential, #168
MiyamotoNagai potential formatting, #168
potential formatting for the flattenedPowerPotential, #168
potential formatting for KGPotential, fixes #168
test alpha=0 FlattenedPowerPotential model and fix its density
fix potential in doc, #168