Add initial infrastructure for io.ascii meta handling
Update DAOphot reader to use new meta infrastructure
Parse IPAC table metadata (keywords and comments)
Fix mistake in IPAC reader docstring
Improve DAOphot and IPAC reader docstrings
Improve the CDS reader doc string regarding metadata
Update IPAC docstring to fix an error in sphinx build
Make IPAC and DAOphot examples work literally and show output
Replace docstring < etc > with ... so doctest will work
Merge pull request #842 from taldcroft/ascii/meta

Metadata infrastructure for io.ascii with application to IPAC and DAOphot