Deliver remaining functionality

[Neilmagi]

Downloads of:

• Data
• Disclaimer
• Spatial polygons
• Plots

Spatial Analysis:

• Generate spatial polygons from biodiversity filters
• Intersect with user-input spatial filters
• Provide pre-defined spatial filters for EEZ
• Present options for summary stats - Ecoregion or EEZ
• Map overlays for human activities from EMODNET

UI refinement:

• Landing page map -> icons