Add parameter 'direction' to applybeam and use phasecentre by default
Created by: aroffringa
Fixes #68 (closed). The beam keywords added in #60 (closed) are stored accordingly to the chosen beam direction or phase centre.
Created by: aroffringa
Fixes #68 (closed). The beam keywords added in #60 (closed) are stored accordingly to the chosen beam direction or phase centre.