test vrpmllpmbb_to_vxvyvz
test vxvyvz_to_vrpmllpmbb
test XYZ_to_galcenrect
test galcenrect_to_XYZ
rm some unnecessary code
test sphergal_to_rectgal
test rectgal_to_sphergal
test pmrapmdec_to_pmllpmbb, fails currently at poles
fix cosb in pmllpmbb_to_pmrapmdec
test of pmllpmbb_to_pmrapmdec, fails because at the poles currently (issue #159)
fix cosb in a few more functions
replace pmrapmdec conversion with Poleski's form for the cos and sin of the Galactic parallactic angle, which is better at the poles of the coordinate system, now passes the tests, fixes #159
another replacement of pmrapmdec_to_pmllpmbb functions
test galcencyl_to_XYZ and vice versa
another test of XYZ_to_galcenrect
test vxvyvz_to_galcenrect/cyl
doc tweaks in coords
test galcenrect/cyl_to_vxvyvz; further test of vxvyvz_to_galcencyl
array test of galcenrect_to_vxvyvz
test dl_to_rphi_2d