Migrate content from wiki

doc/generate_doxygen.sh

-#!/bin/sh
-
-# Copyright 2015 The Crashpad Authors. All rights reserved.
-#
-# 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.
-
-set -e
-
-# Generating Doxygen documentation requires Doxygen, http://www.doxygen.org/.
-
-# Run from the Crashpad project root directory.
-cd "$(dirname "${0}")/.."
-
-output_dir=out/doc/doxygen
-
-rm -rf "${output_dir}"
-mkdir -p "${output_dir}"
-
-doxygen doc/crashpad.doxy