Test data files.

Most of the files have been contributed by pgloader users in the context of an issue where it was helpful to have a test case to reproduce and fix a bug.

The following DBF test files come from the Open Source repository at https://github.com/infused/dbf/tree/master/spec/fixtures

• dbase_31.dbf
• dbase_31_summary.txt
• dbase_8b.dbf
• dbase_8b.dbt
• dbase_8b_summary.txt