<bugfix>Fix issue with remove vistrail variable modules and connections</bugfix>
<bugfix>Fix issue with remove vistrail variable modules and connections</bugfix>

The remove methods were not set to determine when a module or connection existed in the scene by checking whether they were (connected to) vistrail variables.  This should already be fixed in the schema-v1_0_3 branch.

gui/pipeline_view.py:
  - QPipelineScene.remove_module: check if vistrail variable
  - QPipelineScene.remove_connection: check if source module is
    vistrail variable

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