Travis continous integration system configuration

This is a basic config that builds the project. Later, more rules will
be added.

.travis.yml

+# Copyright 2015 Google Inc. 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.
+
+# Travis continous inegration system configuration file. 
+#
+# Overview on how to customize the configuration is located at:
+# http://docs.travis-ci.com/user/customizing-the-build/
+
+# Explicitly set the environment to be container-based. This makes the builds faster.
+sudo: false
+# Use Node.js as primary language because Gulp is the build system used in the project.
+language: node_js
+before_script:
+  # Install dependencies required to setup the build.
+  - npm install -g bower
+  - npm install -g gulp
+  - bower install
+script: gulp build