Map GeoJSON : display

[bengaid]

The aim of this new feature is to provide a more flexible, dynamic, expressive and standardized way of displaying geographic information on Leafet Maps in a pure declarative way. Design rationale is to allow the map render a dynamic array of GeoJSON

• Merge old code into a new branch in GitHub
• Recode existing templates done with the "Leafet Maps" widget into the the "GeoJSON Maps" widget
• Identifiy GeoJSON format extensions (baseLayer/overlay, hover, scale presence, circles drawing ...)
• Implement these extensions
• JavaScript code refactoring into several files to simplify its maintaince
• Upgrade documentation and templates

Followed by @abirEF