Add 'pm_ra' and 'pm_dec' attributes
Add Coordinates.__new__() — make 'pm_ra' and 'pm_dec' optional
Update Coordinates class docstring
Add CoordinatesTest.get_random_pm() static method
Update CoordinatesTest.random() class method
Add Coordinates.get_exact_coordinates()
Add unit test for Coordinates.get_exact_coordinates()
Merge branch 'update-Coordinates' into objects-with-proper-motions
Add FITSImage.year()
Turn FITSImageTest.test_date() into test_date_and_year()
Merge branch 'update-FITSImage' into objects-with-proper-motions
Allow comments in the coordinates file — starting with '#'
Update regexp — match proper motions, surrounded by brackets
Update ValueError message
Return a four-element tuple (coordinates and proper motions)
Update docstring
Add proper motions to the tuple with each object's coordinates
Add ten stars with high proper motions
Update comment
Update LoadCoordinatesTest.get_coords_data()