fix DehnenBar tests for new initialization of DehnenBar
first test of example in the paper, #188
further section 2 tests, #188
test that the potential methods work, #188
test of TimeInterpPotential #188
tests of the orbit integration and methods examples, #188
further orbit tests, #188
test the adiabatic invariance example, #188
rm vt response again for now
download the pre-calculated corrections
tests of dfs, #188
turn on all tests, #188
rm print
fix doc link to pmradec...
add test of coordinate example, fixes #188