Merge pull request #75 from abarth/setup_travis

Add basic travis integration

.travis.yml

+language: dart
+sudo: required
+before_install:
+  - ./travis/before_install.sh
+before_script:
+  - ./travis/setup.sh
+  - export PATH=$PWD/depot_tools:$PATH
+  - export BOTO_CONFIG=$PWD/boto
+script: ./travis/build.sh

travis/before_install.sh

+#!/bin/bash
+set -ex
+

travis/build.sh

+#!/bin/bash
+set -ex
+
+./sky/tools/gn --debug
+ninja -j 8 -C out/Debug

travis/gclient

+solutions = [{
+  "name"        : "src",
+  "url"         : "https://github.com/domokit/sky_engine.git",
+  "deps_file"   : "DEPS",
+  "managed"     : False,
+  "safesync_url": "",
+}]
+target_os = ['android', 'linux']

travis/setup.sh

+#!/bin/bash
+set -ex
+
+# Get depot_tools.
+git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
+export PATH="$(pwd)/depot_tools:${PATH}"
+
+# Get gsutil
+rm -f gsutil.tar.gz
+wget https://storage.googleapis.com/pub/gsutil.tar.gz
+tar xzf gsutil.tar.gz
+
+# Get dependencies.
+sudo apt-get install libdbus-1-dev
+sudo apt-get install libgconf2-dev
+sudo apt-get install python-openssl
+sudo easy_install pip
+sudo pip install requests
+
+gclient sync --gclientfile=travis/gclient