Mention gem update required.

pages/SpacialDB-Standard-Schema.md

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-The SpacialDB `Standard Schema` lets you store geometries and key-value attributes within a named layers. Although the geometry (PostGIS Geometry Type) and key-value attributes (HStore) can be accessed via a database connection, SpacialDB provides a very convenient and highly optimised JSON and JSONP [[REST API | api_v1]] for accessing these tables. It is designed to provide developers with a flexible schema that can be used by most applications.
+The SpacialDB `Standard Schema` lets you store geometries and key-value attributes within a named layers. Although the geometry (PostGIS Geometry Type) and key-value attributes (HStore) can be accessed via a database connection, SpacialDB provides a very convenient and highly optimised JSON and JSONP [[REST API | api_v1]] for accessing these tables. It is designed to provide developers with a flexible schema that can be used by most applications without needing a database connection.
 
-In SpacialDB lingo these tables are called Layers and they are perfect for building mobile applications. Currently Layers are created and managed via the spacialdb commandline interface. You can create them with a single command like `spacialdb layers:add NAME`. This will give you an operational geospatial database table and access to the API. For more on managing layers see [[API layer management | CLI-Usage#api_layer_management]] section in [[CLI-Usage]] page or type `spacialdb help layers` on the commandline.
+In SpacialDB lingo these tables are called Layers and they are perfect for building mobile applications. Currently Layers are created and managed via the spacialdb command-line interface. You can create them with a single command like `spacialdb layers:add NAME`. This will give you an operational geospatial database table and access to the API. For more on managing layers see [[API layer management | CLI-Usage#api_layer_management]] section in [[CLI-Usage]] page or type `spacialdb help layers` on the command-line. 
+
+>  **To use this feature make sure you have updated your spacialdb gem to v0.3 or above.**
 
 Thus SpacialDB `Standard Schema` abstracts the complexity of storing and querying geospatial data by treating each standard schema table as a Layer. The JSON and JSONP [[REST API | api_v1]] allows you to access these layers using your API keys. The basic syntax of the layer is as follows:
 
       /users/:user/layers/:layername?key=<accessKey>
 
-In cases where geospatial data is returned the response is in `GeoJSON`. Check out this [quick and dirty map](http://jsfiddle.net/sabman/n85Qr/9/) thrown together using the API and Standard Schema Layer.
+In cases where geospatial data is returned the response is in `GeoJSON`. Check out this [quick and dirty map](http://bit.ly/qoPcMY) thrown together using the API and Standard Schema Layer.