ENH: implement FormHandler grid, template @abinesh.lal

README.md

@@ -323,6 +323,9 @@ The full list of options is below. Simple options can be specified as `data-` at
     - `args`: the URL query parameters passed to the FormHandler
     - `options`: the options applicable to the FormHandler
     - returns a dict with modified values of `data` and `meta`
+- `icon`: if `table: 'grid'` is used, display an icon:
+  - `icon: 'fa fa-home fa-3x'` renders a FontAwesome home icon
+  - `icon: './path/to/image.png'` renders the image specified
 
 **Advanced**. Each component can have a target which specifies a selector. For
 e.g., to render the export button somewhere else, use