Added sort_by and sort_dir to solr query call to sort by a return field and choose the sort direction (asc or desc).  Added these options to the search resource along with an option to search metagenomes by md5.  Added job number and PI_lastname to solr schema so we can retrieve that information directly from solr and added those to the search resource.
Merge pull request #362 from jaredbischof/develop

Added sort_by and sort_dir to solr query call to sort by a return field ...