Latest genome build, eland_config file temp. solution patch.

Latest genome build, eland_config file temp. solution patch.
 * As per Diane's suggestion, the config file being generated will only
   contain the species name, which will mean "use latest build" for
   this species. At a later time when the web UI has been updated to allow
   overriding this default and selecting a specific genome build to
   use (the species_name|build_num convention will return). See
   ticket:50 for more information.