Enable continuous build for OS X with Travis-CI.

Note that Linux build is still disabled as Ubuntu 14.04 is not
available in Travis-CI yet.
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..8f69a61
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,56 @@
+# Copyright 2010-2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+os:
+  - osx
+
+language: objective-c
+
+install:
+  - git submodule add https://github.com/open-source-parsers/jsoncpp.git src/third_party/jsoncpp
+  - git -C src/third_party/jsoncpp checkout 11086dd6a7eba04289944367ca82cea71299ed70
+  - git submodule add https://chromium.googlesource.com/external/gmock src/third_party/gmock
+  - git -C src/third_party/gmock checkout 29763965ab52f24565299976b936d1265cb6a271
+  - git submodule add https://chromium.googlesource.com/external/gtest src/third_party/gtest
+  - git -C src/third_party/gtest checkout 8245545b6dc9c4703e6496d1efd19e975ad2b038
+  - git submodule add https://chromium.googlesource.com/external/gyp src/third_party/gyp
+  - git -C src/third_party/gyp checkout cdf037c1edc0ba3b5d25f8e3973661efe00980cc
+  - git submodule add https://github.com/google/protobuf.git src/third_party/protobuf
+  - git -C src/third_party/protobuf checkout 172019c40bf548908ab09bfd276074c929d48415
+  - git submodule add https://github.com/hiroyuki-komatsu/japanese-usage-dictionary.git src/third_party/japanese_usage_dictionary
+  - git -C src/third_party/japanese_usage_dictionary checkout e5b3425575734c323e1d947009dd74709437b684
+  - git submodule add https://github.com/googlei18n/fonttools.git src/third_party/fontTools
+  - git -C src/third_party/fontTools checkout 5ba7d98a4153fad57258fca23b0bcb238717aec3
+  - git submodule add https://chromium.googlesource.com/chromium/tools/depot_tools.git src/third_party/depot_tools
+  - export PATH="$PATH":`pwd`/src/third_party/depot_tools
+
+script:
+  - cd ./src
+  - GYP_DEFINES="mac_sdk=10.9 mac_deployment_target=10.8" python build_mozc.py gyp --noqt
+  - python build_mozc.py build -c Release mac/mac.gyp:GoogleJapaneseInput mac/mac.gyp:gen_launchd_confs
diff --git a/README.md b/README.md
index febf9eb..51b6569 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,16 @@
 open-source project originates from
 [Google Japanese Input](http://www.google.com/intl/ja/ime/).
 
+Build Status
+------------
+
+|         |Android |Windows |OS X |Linux |NaCl |
+|---------|:------:|:------:|:---:|:----:|:---:|
+|**Build**|N/A     | N/A    |[![Build Status](https://travis-ci.org/google/mozc.svg?branch=travis-initial-setup)](https://travis-ci.org/google/mozc) |N/A |N/A |
+
+
+What's Mozc?
+------------
 For historical reasons, the project name *Mozc* has two different meanings:
 
 1. Internal code name of Google Japanese Input that is still commonly used
@@ -17,7 +27,9 @@
 
 In this repository, *Mozc* means the second definition unless otherwise noted.
 
-#License
+License
+-------
+
 All Mozc code written by Google is released under
 [The BSD 3-Clause License](http://opensource.org/licenses/BSD-3-Clause).
 For thrid party code under [src/third_party](src/third_party) directory,