<bugfix> File > Export > PDF was not working </bugfix>
<bugfix> File > Export > PDF was not working </bugfix>

--

gui/graphics_view.py
class QInteractiveGraphicsView
  renamed method saveToPDF to save_pdf and incorporated some of the code
  in the QBuilderWindow that asks for a filename if None is provided.

VisTrails/VisTrails,Nikea/VisTrails,Nikea/VisTrails,celiafish/VisTrails,VisTrails/VisTrails,hjanime/VisTrails,Nikea/VisTrails,hjanime/VisTrails,minesense/VisTrails,minesense/VisTrails,VisTrails/VisTrails,minesense/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,celiafish/VisTrails,Nikea/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,minesense/VisTrails,celiafish/VisTrails,minesense/VisTrails,hjanime/VisTrails,celiafish/VisTrails