Updated request and response samples to the simplier model definitions

docs/samples/request_get.xml

@@ -1,8 +1,7 b''
 <?xml version="1.1" encoding="UTF-8" ?>
 <request version="1.0" type="get">
-    <model>post</model>
-    <filter>
+    <model version="1.0" name="post">
         <id>id1/1</id>
         <id>id2/56</id>
-    </filter>
+    </model>
 </request>

docs/samples/request_pull.xml

@@ -1,19 +1,17 b''
 <?xml version="1.1" encoding="UTF-8" ?>
 <request version="1.0" type="pull">
-    <model>post</model>
-    <filter>
-        <version>3</version>
+    <model version="1.0" name="post">
         <timestamp_from>0</timestamp_from>
         <timestamp_to>0</timestamp_to>
         <tags>
             <tag>tag1</tag>
         </tags>
         <sender>
             <allow>
                 <key>abcehy3h9t</key>
                 <key>ehoehyoe</key>
             </allow>
             <!-- There can be only allow block (all other are denied) or deny block (all other are allowed) -->
         </sender>
-    </filter>
+    </model>
 </request>

docs/samples/response_get.xml

@@ -1,32 +1,26 b''
 <?xml version="1.1" encoding="UTF-8" ?>
 <response>
     <status>success</status>
     <models>
-        <post>
+        <model name="post">
             <id>id1/1</id>
             <title>13</title>
             <text>Thirteen</text>
             <thread>id1/12</thread>
             <pub-time>12</pub-time>
             <edit-time>13</edit-time>
             <previous-id>id1/3,id23/5</previous-id>
             <after-id>id2/3,id43/5</after-id>
-        </post>
-        <post>
+        </model>
+        <model name="post">
             <id>id1/2</id>
             <title>13</title>
             <text>Thirteen</text>
             <pub-time>12</pub-time>
             <edit-time>13</edit-time>
             <tags>
                 <tag>tag1</tag>
             </tags>
-        </post>
-        <post>
-            <id>id2/1</id>
-        </post>
-        <post>
-            <id>id2/5</id>
-        </post>
+        </model>
     </models>
 </response>