Data for Common Astronomy Software Applications core library

 This package will install a basic set of data tables to be used by
 Common Astronomy Software Applications core library at runtime and
 test:
 .
  * IGRF: International Geomagnetic Reference Field data
  * Jet Propulsion Laboratory Development Ephemeris
  * Sources: Table of ICRF2 reference source coordinates
  * Lines: Table of spectral line frequencies
  * Observatories: Table of radio observatory coordinates
  * TAI_UTC: Difference table between TAI and UTC
 .
 Note that the earth orientation data are not available yet.