Changed code to suit new name for the field linking designs to their runtime versions (new name LearningDesign.originalLearningDesign). Modified the copyLearningDesign routines to only set the field when creating a runtime design - don't want to link the designs when the user duplicates a design in authoring. Finally, changed the delete learning design methods to delete a design even if it is the parent of other designs (note: this leaves the child designs pointing to a parent that does not exist).
