WIP - Partially integrated the core ingestion logic, and changed db schema, getScenrio is also updated to handle aoi-bbox.

The operation ManageScenario/getScenario/id=<...> now includes the bounding box as:
 {"aoi_bbox": {"lc": [5.0, 42.0], "uc": [6.0, 43.0]}, "ncn_id": "scid0", ... }
Database schema has been changed to include a 'aoi_type', wich can be 'BB' or 'PO' -
  'Bounding Box' or 'Polygon'.  Only BB is implemented so far.