v1.8.1

• Add palpy version to imported code (as __version__).

palpy version 1.7.0

• Add test for fk524 (thanks to Scott Daniel)
• Addition of many vectorized routines (thanks to Scott Daniel)
• Upgrade PAL to v0.9.3
• Upgrade ERFA to v1.2.0

Version 1.3

• Include PAL v0.7.0.
• Add polmo (polar motion).

PALpy Version 1.2

• Include PAL v0.6+
• Include ERFA v1.1.1
• Submodules now use explicit https URLs to make them more robust
  (especially when forking the repo) (thanks to Srini Chandrasekharan).
• New interfaces added: altaz, dmxv (thanks to Srini Chandrasekharan
  for those 2), dav2m, deuler, dmxm, dimxv, dm2av, dvn and dvxv.
• Some routines now have "Vector" forms to allow numpy arrays to be
  given as arguments and to return numpy arrays with results. This
  provides a signficant performance enhancement over looping in
  Python code: aopqkVector, de2hVector, ds2tpVector, mapqkVector,
  mapqkzVector, pmVector (Thanks to Scott Daniel for these).
• Explicitly include GPLv3 text in distribution.
• New routine palvers() can be used to obtain the version
  information of the underyling C PAL library.
• Python docstring documentation is now included for all
  palpy routines.

PALPY V1.1

• Includes PAL v0.5.0
• Now ships with ERFA v1.1 rather than SOFA. This clarifies
  the license of the included code.
• New interfaces added for refraction and moving sources. The new
  functions are: epv, evp, el2ue, pertel, pertue, planel, planet,
  plante, plantu, pv2el, pv2ue, rdplan, ue2el, ue2pv, atmdsp,
  refcoq, refro, refv, aopqk, prenut, prenut, refco and refz.
  Thanks to @danielsf for adding the final four in that list.