Drugbank changes to have output compatible with sesame 

The sesame parser was not accepting certain characters, in particular the """ produced by QuadText method. These were changed to use QQuadL and SafeLiteral methods to generate acceptable literals.

This includes a "fix" to malformed urls being produced: 

> 2013-02-20 09:59:16,982 ERROR org.sindice.core.analytics.cascading.function.AbstractRDFParserFuntion: Couldn't parse statement: [<http://bio2rdf.org/drugbank:DB00483> <http://www.w3.org/2000/01/rdf-schema#seeAlso> \< Gallamine_triethiodide \>  .]