How to add an Esri grid file as a layer to your project

Below is an example of how to do that: (to be included as a layer in a project.json file)

{
       "id": "ESRIGrid",
       "reference": "Esri",
       "languages": {
           "nl": {
               "title": "ESRI Grid",
               "description": "Test voor het inlezen van een ESRI Grid bestand."
           },
           "en": {
               "title": "ESRI Grid",
               "description": "Test reading an ESRI Grid file."
           }
       },
       "type": "grid",
       "renderType": "geojson",
       "dataSourceParameters": {
           "gridType": "esri"
           },
       "url": "data/projects/20141104_csMap/esri_ascii_grid.txt",
       "enabled": false,
       "opacity": 50
   }