Map v2

Hi,

Creating a new pull request with:

• Most of the JavaScript code is now in the src folder on a class that depends on MapboxGL and osmtogeojson libraries
• Taken the last POIs loaded by @olea
• Added a custom icons palette based on Mapbox maki icons as a full new sprite, all stored in the same folder the JavaScript code resides
• More logic to render the custom icons
• Structure to load routes in place to start working on that apart asap
• A bit of Grunt code to deal with these new resources out of the map.html file.

Please take a look, this new code needs Grunt to be run, but I understand that is already addressed during the site deployment.