Final Planmap delivery

This version contain the latest stories and app updates under the Planmap project scope.

Fix bugs and update stories

• Include Moon multi-layers
• Update media in Mars
• Fix Mercury basemap.
• Document stories data structure.

SWA with general stories structure

This first stable release provides the basic structure for multiple-stories in a Single Wep App format.
The app starts with three different story-models, presenting Mars, Mercury, and the Moon.