git ignores for generated sources and exe
fix error on cli args for test_query
add RDF prefixed output for at least the built-in vocabularies

this is hacked together on URIs because for some reason
Raptor doesn't give you the prefixes on a Reader. I would
like to get the prefixes from a Reader to apply directly to the Writer
disable sp2bench that are not supported by compiler

Two main problems
Joins with $0 != $1
condition flip (see issue #104)
add manually expanded RDF strings to sp2b