HBASE-23703 Add HBase 2.2.3 documentation to website (#1059)

Signed-off-by: Jan Hentschel <janh@apache.org>

Author: petersomogyi

src/site/site.xml

@@ -109,8 +109,8 @@
       <item name="Getting Started" href="book.html#quickstart" target="_blank" />
       <item name="User API" href="apidocs/index.html" target="_blank" />
       <item name="User API (Test)" href="testapidocs/index.html" target="_blank" />
-      <item name="Developer API" href="https://hbase.apache.org/2.0/devapidocs/index.html" target="_blank" />
-      <item name="Developer API (Test)" href="https://hbase.apache.org/2.0/testdevapidocs/index.html" target="_blank" />
+      <item name="Developer API" href="devapidocs/index.html" target="_blank" />
+      <item name="Developer API (Test)" href="testdevapidocs/index.html" target="_blank" />
       <item name="中文参考指南(单页)" href="http://abloz.com/hbase/book.html" target="_blank" />
       <item name="FAQ" href="book.html#faq" target="_blank" />
       <item name="Videos/Presentations" href="book.html#other.info" target="_blank" />
@@ -120,12 +120,26 @@
       <item name="Metrics" href="metrics.html" target="_blank" />
       <item name="Cluster replication" href="book.html#replication" target="_blank" />
       <item name="1.4 Documentation">
-        <item name="API" href="1.4/apidocs/index.html" target="_blank" />
-        <item name="Ref Guide (single-page)" href="1.4/book.html" target="_blank" />
+        <item name="Ref Guide" href="1.4/book.html" target="_blank" />
+        <item name="Reference Guide (PDF)" href="1.4/book.pdf" target="_blank" />
+        <item name="User API" href="1.4/apidocs/index.html" target="_blank" />
+        <item name="Developer API" href="1.4/devapidocs/index.html" target="_blank" />
       </item>
       <item name="2.1 Documentation">
-        <item name="API" href="2.1/apidocs/index.html" target="_blank" />
-        <item name="Ref Guide (single-page)" href="2.1/book.html" target="_blank" />
+        <item name="Ref Guide" href="2.1/book.html" target="_blank" />
+        <item name="Reference Guide (PDF)" href="2.1/apache_hbase_reference_guide.pdf" target="_blank" />
+        <item name="User API" href="2.1/apidocs/index.html" target="_blank" />
+        <item name="User API (Test)" href="2.1/testapidocs/index.html" target="_blank" />
+        <item name="Developer API" href="2.1/devapidocs/index.html" target="_blank" />
+        <item name="Developer API (Test)" href="2.1/testdevapidocs/index.html" target="_blank" />
+      </item>
+      <item name="2.2 Documentation">
+        <item name="Ref Guide" href="2.2/book.html" target="_blank" />
+        <item name="Reference Guide (PDF)" href="2.2/apache_hbase_reference_guide.pdf" target="_blank" />
+        <item name="User API" href="2.2/apidocs/index.html" target="_blank" />
+        <item name="User API (Test)" href="2.2/testapidocs/index.html" target="_blank" />
+        <item name="Developer API" href="2.2/devapidocs/index.html" target="_blank" />
+        <item name="Developer API (Test)" href="2.2/testdevapidocs/index.html" target="_blank" />
       </item>
     </menu>
     <menu name="ASF">