added rdf output to datasets.py for entrez-gene
updates to entrez and hgnc classes to support rdf
added default methods to dataset parent class to support rdf
changed dictionary key from name/symbol to id for chebi, mgi, rgd, hgnc, sp
more updates to support RDF export
more updates to support rdf namespace export
deleted rdf.py
updates to fix rdf generation for legacy namespaces
update default methods to account for legacy dataset dicttionaries
use urllib.parse.quote to clean term strings for uris
fixed gobp, gocc dict references
rdfv3 cycles through all NamespaceDataSets stored in pickle files and converts to rdf
other minor fixes, including strippping of 'HGNC:' and 'MGI:' prefixes from IDs
more updates to datasets
updated to make 3 instances of MESHData objects, one for each namespace
updates to methods for writing belns files
fixed namestring issue for annoheaders
removed old template files
updates for equiv to work after datasets.py revisions