Move pins into chapters

[lhcramer]

within the config object, move pins and frames to be contained within chapters instead of within stories on the front end.

[jpierson-boundlessgeo]

Also need to change save code as part of this

[trepagnier]

@todo: find every instance of svc.pins in pinSvc and point instead to stateSvc.getConfig().chapters[svc.getChapterIndex()]

[trepagnier]

@todo: Make a minimal config of chapters. Check mapstory/mapstories/models.py to see the data model.