Create an iframe integration API

[claustres]

Should handle basic features:

• [x] set local storage items
• [x] setup app configuration (e.g. UI, etc.)
• [x] hide/show layers
• [x] switch between 2D/3D mode
• [x] zoom to layer
• [x] create/remove layers
• [x] add/update data to/in existing layer
• [x] configure layer styling (markers, popups, etc.) using custom functions should be covered by https://github.com/kalisio/kMap/issues/63
• [x] get layer data as GeoJson (can be used to inject data with new style)
• [x] raise event when a component is ready to be used (eg map)
• forward event raised by components (can be used for eg selection)
  • [x] feature clicked
• [x] manage embedding options as query parameters we use local storage to persist user configuration

API based on https://github.com/krakenjs/post-robot.

[claustres]

A generic system has been put into place, it allows to call any component method on a given route, this also allow to change the current route. However some methods might require more testing or specific management due to required dynamic data exchange.