Fixed Bundle::handles() to properly get the bundle with the most specific URI

For instance we have registered two bundles (bundles.php):

<code>array(
'cms'=>array('handles'=>'cms'),
'cms-pages'=>array('handles'=>'cms/pages')
)
</code>

Then if we fired this:

<code>Bundle::handles('cms/pages')</code>

We would get 'cms' as the bundle responsible to handle the URI instead of 'cms-pages'.

Much love to Laravel,

Bryan te Beek

Signed-off-by: Bryan te Beek <bryantebeek@gmail.com>