It was discovered today that the 'config-reference' directory
was supposed to have been renamed to 'configuration'. The doc
team was expecting it to be at that location so that they could
automatically link to it from contributor/index.html .
This patch just moves the directory. I am going to be submitting
a subsequent patch that properly sets out the framework for the
additional directories so that we don't have addition problems
in the future.
Change-Id: I6729aaf4593a0b089277f6d7d0aa50fee3ca340f