<feature>Add method to allow updates of a single port rather than all ports as updateUpstream provides</feature> <feature>Dump non-ModuleError exceptions to the console</feature>
<feature>Add method to allow updates of a single port rather than all ports as updateUpstream provides</feature>
<feature>Dump non-ModuleError exceptions to the console</feature>

core/modules/vistrails_module.py:
  - Module.updateUpstreamPort: new method, takes input port name and
    only computes that upstream
  - Module.update: on Exception, print_exc using traceback



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