[AstroPy] asciitable 0.7.0

[Tom Aldcroft]

Version 0.7.0 of asciitable (an extensible module for reading and
writing ASCII tables) is now available.  This release includes the
following key features:

- Added support for reading and writing LaTeX tables
  (contributed by Moritz Guenther).
- Improved the CDS reader by better supporting multi-file
  tables (contributed by Frederic Grollier).
- Refactored the code into a package with functionally distinct modules.
- Added a "type" attribute in the Column class that provides the
  type of a column as IntType, FloatType, or StrType.

Please see: http://cxc.cfa.harvard.edu/contrib/asciitable/

The new Latex and AASTex classes provide the ability to write
publication quality LaTeX tables in both the standard and AAS
"deluxetable" formats.  These classes provide hooks to inject
additional LaTeX commands as needed for more complex tables.

API changes:
- Previously the read(), write(), get_reader() and get_writer()
  raised an exception for unrecognized keyword arguments.  Now
  those extra arguments are passed on to the Reader class
  constructor.  From the user perspective this means you can call
  read()/write() with class initialization arguments (see Cds and
  Latex for examples). For developers it means more flexibility
  in Reader classes.
- One minor API change is not backward compatible.  When
  specifying custom column converters (e.g. to force a column
  that looks like integers to convert to floats) it was
  previously possible to provide either a list of converters or a
  single converter.  Now you must always provide a list of
  converters even it is has only one element.  This was needed to
  support consistent assigment of the Column.type attribute.

Other minor fixes:
- Fixed a bug when the "end_line" parameter is passed a function.
- Fixed a bug where the RDB writer issued incorrect column types.

Cheers,
Tom Aldcroft