Change docs to make a link to jdbc.md

docs/interpreter/postgresql.md

@@ -0,0 +1,28 @@
+---		
+layout: page		
+title: "PostgreSQL, Apache HAWQ (incubating) Interpreter for Apache Zeppelin"		
+description: "Apache Zeppelin supports PostgreSQL, Apache HAWQ(incubating) and Greenplum SQL data processing engines."		
+group: interpreter		
+---		
+<!--		
+Licensed under the Apache License, Version 2.0 (the "License");		
+you may not use this file except in compliance with the License.		
+You may obtain a copy of the License at		
+		
+http://www.apache.org/licenses/LICENSE-2.0		
+		
+Unless required by applicable law or agreed to in writing, software		
+distributed under the License is distributed on an "AS IS" BASIS,		
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.		
+See the License for the specific language governing permissions and		
+limitations under the License.		
+-->		
+{% include JB/setup %}		
+		
+# PostgreSQL, Apache HAWQ (incubating) Interpreter for Apache Zeppelin		
+		
+<div id="toc"></div>		
+		
+## Important Notice		
+		
+Postgresql Interpreter is deprecated and merged into [JDBC Interpreter](./jdbc.md).