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{updated} BasicRestServletGroup

<p>
	The {@link oajr.BasicRestServletGroup} class provides a default "router" page for 
	child resources when a parent resource is nothing more than a grouping of child resources.
</p>		
<p>
	The <l>RootResources</l> class in the Samples project is an example of a router page:
</p>
<p class='bpcode w800'>		
	<jd>/**
	 * Sample REST resource showing how to implement a "router" resource page.
	 */</jd>
	<ja>@RestResource</ja>(
		path=<js>"/"</js>,
		title=<js>"Root resources"</js>,
		description=<js>"Example of a router resource page."</js>,
		children={
			HelloWorldResource.<jk>class</jk>,
			PetStoreResource.<jk>class</jk>,
			DtoExamples.<jk>class</jk>,
			ConfigResource.<jk>class</jk>,
			LogsResource.<jk>class</jk>,
			ShutdownResource.<jk>class</jk>
		}
	)
	<jk>public class</jk> RootResources <jk>extends</jk> BasicRestServletGroup {
		<jc>// NO CODE!!!</jc>
	}
</p>
<p>
	When you bring up this resource in a browser, you see the following that provides a list
	of navigable links to your child resources:
</p>
<p class='bpcode w800'>
	http://localhost:10000
</p>
<img class='bordered w800' src='doc-files/juneau-rest-server.RouterPages.1.png'/>
<p> 
	The {@link oajr.BasicRestServletGroup} class is nothing more than a subclass of 
	{@link oajr.BasicRestServlet} with a <l>getChildren()</l> method mapped to the servlet 
	root path.
	The method returns a POJO with is just a linked-list of beans with name/description properties.
</p>	
<p class='bpcode w800'>
	<jc>// The entire contents of the BasicRestServletGroup class.</jc>
	
	<jk>public class</jk> BasicRestServletGroup <jk>extends</jk> BasicRestServlet {
	
		<ja>@RestMethod</ja>(name=<jsf>GET</jsf>, path=<js>"/"</js>, description=<js>"Child resources"</js>)
		<jk>public</jk> ChildResourceDescriptions getChildren(RestRequest req) {
			<jk>return new</jk> ChildResourceDescriptions(<jk>this</jk>, req);
		}
	}		
</p>