Add juicy example / synopsis of Fix Language usage

[cmharlow]

@jorol will add some examples.

[jorol]

https://github.com/LibreCat/MARC-Conversion-Examples
https://github.com/LibreCat/MARC2RDF
https://github.com/LibreCat/Catmandu-Examples
http://librecat.org/Catmandu/#example-fix-script

[cmharlow]

https://librecatproject.wordpress.com/2014/12/17/day-13-harvest-data-via-oai/