<bugfix>Auto adding subworkflows via _subworkflows now allows references to classes in the same package.</bugfix>
<bugfix>Auto adding subworkflows via _subworkflows now allows
references to classes in the same package.</bugfix>

Auto-add subworkflows *after* all normal modules have been added.
This allows a package developer to add subworkflows to their own
packages more effectively.

core/modules/module_registry.py:
  - ModuleRegistry.initialize_package: do port adds to modules before
    adding subworkflows and their ports



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