Add links for UAV imagery download and use

[cgiovando]

When #116 is done, then we should also add direct links to GeoTIFF downloads and TMS/WMTS endpoints. These can be sourced directly from OAM.

[ppasq]

@cgiovando, @vdeparday since we have more than one image per city in some cases, we should have a list of available images and all their related options (maybe put in a table).
Or do you prefer to have a simple list of available images with the items linking to their own image page in OAM so that the user can have all the options (downloads and uses) there?

[vdeparday]

What about as you had suggested, we just put one link to OAM that shows all the images for that area?

Would that be doable? I just looked and it doesn't seem that easy to do. Because then you see the grid but not really the imagery and it can be a bit confusing to access the actual imagery (for instance on Accra where you have 2 images, and 4 images)