Add travis integration

.travis.yml

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+language: ruby
+rvm:
+  - 2.2
+
+before_script:
+  - bundle
+  - chmod +x ci_script.sh
+
+script: ./ci_script.sh
+
+branches:
+  only:
+  - master
+
+env:
+  global:
+  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer

Gemfile

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+source 'https://rubygems.org'
+
+gem 'awesome_bot'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    awesome_bot (1.7.1)
+      faraday (~> 0.9.2)
+      parallel (~> 1.6.1)
+    faraday (0.9.2)
+      multipart-post (>= 1.2, < 3)
+    multipart-post (2.0.0)
+    parallel (1.6.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  awesome_bot
+
+BUNDLED WITH
+   1.11.2

ci_script.sh

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+#!/usr/bin/env bash
+set -e # halt script on error
+
+for file in topics/*.md
+do
+    bundle exec awesome_bot $file --allow-redirect --set-timeout 10
+done