Component routing

routing.txt

$this->_segment_map = array(
	"items" => array(
		"item" => array(
			"layout" => array(
				"new" => "new"
				"edit" => "edit"
			)
		)
	),
	"item" => "items,
	"featured" => "items",
	"broken" => "items"
)

1. Look up view (from Itemid or otherwise) in the keys of first level
2. If lookup in first level returns a string, do another lookup with that string to see if we 
   can find a better root alias
3. If lookup in first level returns an array, add key to segments and continue to next level
4. Look up view in second level
5. If we get another array, add the key and continue, if we get a string
		- Check this array for a layout="" match and add the required prefix if need be

We have 3 menu items (with aliases)
	test-items	Itemid 12
	test-featured	Itemid 13
	test-broken	Itemid 14
		
Now, the following URL mappings should apply
	
	&Itemid=12			/test-items
	&Itemid=13			/test-featured
	&view=items			/test-items
	&view=featured			/test-featured
	&view=broken			/test-broken
	&view=item&id=1			/test-items/item/1
	&view=item&id=1&layout=edit 	/test-items/item/1/edit
	&view=item&layout=edit		/test-items/item/new

In addition, generating a link using JRoute::_('&view=item&id=1') on test-broken or test-featured, should also provide the link /test-items/item/1 instead of the default which is /test-broken/item/1 or /test-featured/item/1