Use travis sauce connect addon

.travis.yml

@@ -3,6 +3,8 @@ language: ruby
 cache: bundler
 rvm: 1.9.3
 before_install: npm install
+addons:
+  sauce_connect: true
 env:
   global:
   - USE_SAUCE=true

travis-script.sh

@@ -2,10 +2,8 @@
 
 if [ $USE_SAUCE == true ]
 then
-  if [ $TRAVIS_SECURE_ENV_VARS == true ]
+  if [ $TRAVIS_SECURE_ENV_VARS != true ]
   then
-    curl -L https://gist.github.com/santiycr/5139565/raw/sauce_connect_setup.sh | bash
-  else
     echo "skipping tests since we can't use sauce"
     exit 0
   fi