used core gff_config.properties to map GFF3 to InterMine attribute(s),
cleaned up unwanted sections in the AipGffGFF3RecordHandler,
removed from gff_additions.xml the attributes defined in the core,
updated the mapping of GFF3 `Alias` to InterMine `Synonym`,
updated webconfig-model.xml to display synonyms in report header
GFF3Converter.java now skips defined list of GFF3 terms (excludes),
TAXON_ID.excludes should be defined in gff_config.properties
add pointers to external mines, MedicMine (JCVI) and PhytoMine (JGI)
add mine self-reference to global.web.properties
do not index Homologue and Interaction records