Implemented Spira::DSL.type, allowing model objects to specify an RDF.type.
Implemented Spira::DSL.type, allowing model objects to specify an
RDF.type.

Implemented .count based on this.

PerfectMemory/spira,bhuga/spira,ruby-rdf/spira,clnx/spira,datagraph/spira,gkellogg/spira