PARQUET-607: Public writer header

Author: Uwe L. Korn <uwelk@xhochy.com>

Closes apache#100 from xhochy/parquet-607 and squashes the following commits:

88fbfb5 [Uwe L. Korn] PARQUET-607: Public writer header

Change-Id: Iee0998f05d5a9625e17c3e9ae4b94a07ac5376a4

Author: xhochy

cpp/src/parquet/api/CMakeLists.txt

@@ -19,5 +19,6 @@
 install(FILES
   io.h
   reader.h
+  writer.h
   schema.h
   DESTINATION include/parquet/api)

cpp/src/parquet/api/writer.h

@@ -0,0 +1,32 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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.
+
+#ifndef PARQUET_API_WRITER_H
+#define PARQUET_API_WRITER_H
+
+// Column reader API
+#include "parquet/column/writer.h"
+#include "parquet/exception.h"
+#include "parquet/file/writer.h"
+
+// Schemas
+#include "parquet/api/schema.h"
+
+// IO
+#include "parquet/api/io.h"
+
+#endif  // PARQUET_API_WRITER_H