docs: Update BlockStorage API guide

According to the Cinder API documentation the GET /snapshots and GET
/snapshots/detail call should return the same detailed results. Cyclades
behave correctly on this matter, but the BlockStorage API guide contains
incorrect and misleading examples.

This commit fixes the above issue.

docs/blockstorage-api-guide.rst

@@ -668,7 +668,7 @@ List all snapshots related to the user.
 URI                    Method Cyclades OS/Block Storage
 ====================== ====== ======== ==========
 ``/snapshots``         GET    ✔        ✔
-``/snapshotss/detail`` GET    ✔        ✔
+``/snapshots/detail``  GET    ✔        ✔
 ====================== ====== ======== ==========
 
 * Both requests return a list of snapshots. The first returns just ``id``,
@@ -727,18 +727,32 @@ The snapshot attributes are listed `here <#snapshot-ref>`_
         ],
         "id": "42",
         "display_name": "Snapshot One",
+        "status": "ACTIVE",
+        "size": 2,
+        "display_description": null,
+        "created_at": "2014-05-19T19:52:04.949734",
+        "metadata": {},
+        "volume_id": "123",
+        "os-extended-snapshot-attribute:progress": "100%"
       }, {
         "links": [
           {
-            "href": "https://example.org/cyclades/v2/snapshots/42",
+            "href": "https://example.org/cyclades/v2/snapshots/43",
             "rel": "self"
           }, {
-            "href": "https://example.org/cyclades/v2/snapshots/42",
+            "href": "https://example.org/cyclades/v2/snapshots/43",
             "rel": "bookmark"
           }
         ],
-        "id": "42",
+        "id": "43",
         "display_name": "Snapshot Two",
+        "status": "ACTIVE",
+        "size": 3,
+        "display_description": null,
+        "created_at": "2014-05-20T19:52:04.949734",
+        "metadata": {},
+        "volume_id": "124",
+        "os-extended-snapshot-attribute:progress": "100%"
       }
     ]
   }