Issued a warning containing, unit, scale and link to documentation after checking the unit of the column in the table.
Issued a warning after checking the unit of columns in the table. The warning contains column name, unit, scale factor and a link to
documentation. May needone more tweak. Will be back soon.
The warning is not touched. May not be issued because of change in astropy/io/fits/connect.py
Added 'nitpicky=True' to identify broken links, which turn out to be over 2000!