doc update

doc/README

@@ -23,8 +23,8 @@ Example :
 var map = Gp.map.load(
     "mapDiv",                     // html element id  where to attach the map
     {                             // mapOptions
-        apiKey : "YOUR_API_KEY",   // geoportal access key
-        library : "itowns",        // "ol" by default. Library the map will be loaded with.
+        apiKey : "YOUR_API_KEY",  // geoportal access key
+        viewMode : "3d",          // "2d" by default.
         center : {                // -> map center params
             location : "73 avenue de Paris, Saint-Mandé"
         },
@@ -67,7 +67,7 @@ See [Gp.MapOptions property](Gp.MapOptions.html) : **mapEventsOptions** and {@li
 
 If you want more functionalities, you will then have to use those offered by :
 
-* [OpenLayers 3 API](http://openlayers.org/en/latest/apidoc/) and its [dedicated Geoportal extension](https://github.com/IGNF/geoportal-extensions/blob/master/README-openlayers.md) which are part of the Geoportal SDK.
+* [OpenLayers API](http://openlayers.org/en/latest/apidoc/) and its [dedicated Geoportal extension](https://github.com/IGNF/geoportal-extensions/blob/master/README-openlayers.md) which are part of the Geoportal SDK.
 
 * [iTowns API](http://www.itowns-project.org/itowns/API_Doc/) and its [dedicated Geoportal extension](https://github.com/IGNF/geoportal-extensions/blob/master/README-itowns.md) which are part of the Geoportal SDK.