Revert "Switched default config.clj.example to use a MARC XML file"
Revert "Switched default config.clj.example to use a MARC XML file"

This will be obsoleted by the merge I'm about to do.

This reverts commit e5eabacc8db8e02f544789e68ea07b23330c4bcf.

marktriggs/marcgrep,marktriggs/marcgrep,marktriggs/marcgrep