Option to show undefined proerties and children which are in the node type

This PR adds support for showing "unfulfilled" child nodes and properties as defined in the node type. Below the "template" properties and child nodes are designated with the `@` prefix.

````
PHPCRSH > ls -L3
+--------------------------+------------------+---------------------------------------------------------+
| Europe2014/              | DTLTravel:voyage |                                                         |
| | 2014/                  | DTLTravel:year   |                                                         |
| |   06/                  | DTLTravel:month  |                                                         |
| |     05/                | DTLTravel:day    |                                                         |
| |     @*                 | DTLTravel:day    |                                                         |
| |     jcr:primaryType    | NAME             | DTLTravel:month                                         |
| |     jcr:createdBy      | STRING           | admin                                                   |
| |     jcr:created        | DATE             | 2014-06-06T07:43:45+00:00                               |
| |     jcr:lastModifiedBy | STRING           | admin                                                   |
| |     jcr:lastModified   | DATE             | 2014-06-06T07:43:45+00:00                               |
| |   @*                   | DTLTravel:month  |                                                         |
| |   jcr:primaryType      | NAME             | DTLTravel:year                                          |
| |   jcr:createdBy        | STRING           | admin                                                   |
| |   jcr:created          | DATE             | 2014-06-06T07:43:44+00:00                               |
| |   jcr:lastModifiedBy   | STRING           | admin                                                   |
| |   jcr:lastModified     | DATE             | 2014-06-06T07:43:44+00:00                               |
| | @*                     | DTLTravel:date   |                                                         |
| | jcr:primaryType        | NAME             | DTLTravel:voyage                                        |
| | startDate              | DATE             | 2014-04-21T00:00:00+00:00                               |
| | jcr:createdBy          | STRING           | admin                                                   |
| | jcr:created            | DATE             | 2014-06-04T20:54:13+00:00                               |
| | jcr:lastModifiedBy     | STRING           | admin                                                   |
| | jcr:lastModified       | DATE             | 2014-06-06T14:01:37+00:00                               |
| | description            | STRING           | Santander, Mnt Ventoux, Mnt Blanc, Pass di Simplone,... |
| | @endDate               | DATE             |                                                         |
| Morroco2012              | DTLTravel:voyage |                                                         |
|   @*                     | DTLTravel:date   |                                                         |
|   jcr:primaryType        | NAME             | DTLTravel:voyage                                        |
|   jcr:createdBy          | STRING           | admin                                                   |
|   jcr:created            | DATE             | 2014-06-05T18:59:26+00:00                               |
|   jcr:lastModifiedBy     | STRING           | admin                                                   |
|   jcr:lastModified       | DATE             | 2014-06-05T19:00:07+00:00                               |
|   description            | STRING           | Starting from Paris, went south thorugh the Massive ... |
|   @endDate               | DATE             |                                                         |
|   @startDate             | DATE             |                                                         |
````