Make the travis log shorter, enable coveralls rails mode

.travis.yml

@@ -8,12 +8,13 @@ notifications:
   email:
     on_success: change
     on_failure: change
-script:
-  - "cp config/database.yml.example config/database.yml"
-  - "cp config/config.yml.example config/config.yml"
+before_install:
+  - export DISPLAY=:99.0
+  - sh -e /etc/init.d/xvfb start
+before_script:
+  - cp config/database.yml.example config/database.yml
+  - cp config/config.yml.example config/config.yml
   - RAILS_ENV=test bundle exec rake db:migrate --trace
   - bundle exec rake db:test:prepare
+script:
   - bundle exec rake spec
-before_install:
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"