Added script using Perl Items API to prepare static metadata for DataSource(s) and DataSet(s) relating to any mine

Input to this script is a tab-delimited file containing the metadata and the core.xml; output is an intermine-items-xml-file which is set up as a new data source in the mine `project.xml` (and placed before the
`update-publications` source)

@julie-sullivan or @sergiocontrino, please review these changes (refer to AIP-JIRA ticket [MINE-293] for more information) and provide any comments/feedback regarding this implementation.

Thank you!