bifsmw2owl: handling BIFD instances

[rondelion]

Currently, only Glutamate is handled by explicit coding.
All NeuroTransmitter and ModType should be handled as bifd instances as they are typed in the dump rdf as follows:
<rdf:type rdf:resource="http://183.181.89.140/mediawiki/index.php/Special:URIResolver/Category-3ABIF-3ANeuroTransmitter"/>
<rdf:type rdf:resource="http://183.181.89.140/mediawiki/index.php/Special:URIResolver/Category-3ABIF-3AModType"/>