Add Travis and a basic smoke test

.gitignore

@@ -2,3 +2,5 @@
 .sass-cache
 Gemfile.lock
 example/_site
+_site
+.sass-cache

.travis.yml

@@ -0,0 +1,7 @@
+language: ruby
+cache: bundler
+sudo: false
+rvm: 2.2
+
+install: script/bootstrap
+script: script/cibuild

script/bootstrap

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -e
+
+gem install bundler
+bundle install

script/build

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -e
+
+echo "Buidling the example site..."
+bundle exec jekyll build --source example

script/cibuild

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+set -e
+
+script/build
+
+if test -e "./_site/index.html";then
+  echo "It builds!"
+  rm -Rf _site
+  exit 0
+else
+  echo "Huh. That's odd. The example site doesn't seem to build."
+  exit 1
+fi