ENH: Add a Parser to read fixed-width ASCII data using a data description file or dictionary file
As an example, I would like to be able to read a dataset like this one:

http://www.cdc.gov/nchs/nsfg/nsfg_cycle6.htm

The data files themselves are ASCII with fixed-width fields.  The variables names, types, and indices are in a separate data description file, available for SAS, SPSS and STATA.  I would like to add a parser that reads at least one of these description files and then parses the data file.  Since two files are used, it might require changes in the Parser API.

I am happy to write a parser that reads the dictionary file and then the data file.  I could use help with either setting up the new parser ahead of time or (after the fact) integrating my code with the existing structure.

Also, is there a preference for the SAS, SPSS, or Stata format?
