try to get travis build working

.travis.yml

@@ -1,3 +1,7 @@
 language: ruby
 rvm:
   - "2.1.0"
+addons:
+  postgresql: "9.3"
+before_script:
+  - psql -c 'create database travis_ci_test;' -U postgres

config.yml.travis

@@ -0,0 +1,7 @@
+database: 'postgres://postgres@localhost/travis_ci_test'
+database_pool: 1
+session_secret: 's3cr3t'
+recaptcha_public_key: '1234'
+recaptcha_private_key: '5678'
+phantomjs_url:
+  - http://localhost:8910

environment.rb

@@ -12,7 +12,16 @@ require 'zip'
 Bundler.require
 Bundler.require :development if ENV['RACK_ENV'] == 'development'
 
-$config = YAML.load_file(File.join(DIR_ROOT, 'config.yml'))[ENV['RACK_ENV']]
+if ENV['TRAVIS']
+  $config = YAML.load_file File.join(DIR_ROOT, 'config.yml.travis')
+else
+  begin
+    $config = YAML.load_file(File.join(DIR_ROOT, 'config.yml'))[ENV['RACK_ENV']]
+  rescue Errno::ENOENT
+    puts "ERROR: Please provide a config.yml file."
+    exit
+  end
+end
 
 DB = Sequel.connect $config['database'], sslmode: 'disable', max_connections: $config['database_pool']
 DB.extension :pagination