ESFEX v0.1.1

Patch release fixing crashes in the Studio Grid Builder and GeoJSON import flows.

Fixed

• Grid Builder demand forecast crash — the per-node demand forecast read
  latitude/longitude on grid nodes, but GuiNode exposes its position as
  centroid_lat/centroid_lng. Running the forecast raised
  AttributeError: 'GuiNode' object has no attribute 'latitude'.
• Fuel-entry-point duplication crash — duplicating a fuel entry point
  nudged coordinate.latitude/.longitude, but GeoPoint uses lat/lng.
• GeoJSON fuel-entry import — fuel entry points were built with invalid
  max_import_rate/import_cost keyword arguments; import parameters now pass
  through the fuel_params mapping.
• GeoJSON node import — nodes are created from Point features and snapped
  to the nearest existing node by great-circle (haversine) distance, instead of
  always attaching to the first node.

Changed

• Native Julia test suite expanded from smoke tests to full unit and
  end-to-end model-solve coverage, reported to Codecov under a julia flag.

Full changelog: v0.1.0...v0.1.1