Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+<!---
+  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.
+-->
+
+# Red Parquet - Apache Parquet Ruby
+
+Red Parquet is the Ruby bindings of Apache Parquet. Red Parquet is based on GObject Introspection.
+
+[Apache Parquet](https://parquet.apache.org/) is a columnar storage format.
+
+[GObject Introspection](https://wiki.gnome.org/action/show/Projects/GObjectIntrospection) is a middleware for language bindings of C library. GObject Introspection can generate language bindings automatically at runtime.
+
+Red Parquet uses [Apache Parquet GLib](https://github.com/apache/arrow/tree/master/c_glib/parquet-glib) and [gobject-introspection gem](https://rubygems.org/gems/gobject-introspection) to generate Ruby bindings of Apache Parquet.
+
+Apache Parquet GLib is a C wrapper for [Apache Parquet C++](https://github.com/apache/arrow/tree/master/cpp/src/parquet). GObject Introspection can't use Apache Parquet C++ directly. Apache Parquet GLib is a bridge between Apache Parquet C++ and GObject Introspection.
+
+gobject-introspection gem is a Ruby bindings of GObject Introspection. Red Parquet uses GObject Introspection via gobject-introspection gem.
+
+## Install
+
+Install Apache Parquet GLib before install Red Parquet. See [Apache Arrow install document](https://arrow.apache.org/install/) for details.
+
+Install Red Parquet after you install Apache Parquet GLib:
+
+```text
+% gem install red-parquet
+```
+
+## Usage
+
+```ruby
+require "parquet"
+
+table = Arrow::Table.load("/dev/shm/data.parquet")
+# Process data in table
+table.save("/dev/shm/data-processed.parquet")
+```