Objective imports with sections now also connect to parent object.

Per [68658686](https://www.pivotaltracker.com/story/show/68658686).  Old spec was that any imported objective with a section/clause is connected to that section *instead of* the parent object (program or directive) it imports to.  This makes it connect to the section clause *in addition* to that parent object.

Required adding new k/v pairs to  importer options dict.