* Fixed write_vistrail to output pipelines with abstractions to support   bookmarks * Still need to work on open_workflow code for this * Still need to work on db support for this -- problem is that abstractions   are global on the db
* Fixed write_vistrail to output pipelines with abstractions to support
  bookmarks
* Still need to work on open_workflow code for this
* Still need to work on db support for this -- problem is that abstractions
  are global on the db

gui/vistrail_controller.py:
  - VistrailController.write_workflow: change so that workflows are written with
    abstractions saved to the xml file as well
    *** this doesn't work for relational side yet !!! ***
  - VistrailController.write_expanded_workflow: write workflow with all 
    abstractions expanded


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