Move deploy only tasks into deploy block

.travis.yml

@@ -31,12 +31,9 @@ before_install:
     - curl -Lo chrome.zip https://download-chromium.appspot.com/dl/Linux_x64 && unzip chrome.zip
     - curl -Lo chromedriver.zip http://chromedriver.storage.googleapis.com/2.18/chromedriver_linux64.zip && unzip chromedriver.zip
 before_script:
-    # install dependencies
-    - npm install -g gulp
     - cp site-assets/favicon.ico favicon.ico
     - python -m SimpleHTTPServer > /dev/null 2>&1 &
     - sleep 2
 script:
     # We want to gate on passing tests and a successful build
-    - gulp
     - ./test-runner.sh

test-runner.sh

@@ -11,6 +11,8 @@ get_changes ()
 
 if [ "$TRAVIS_BRANCH" = "master" ] && [ "$TRAVIS_PULL_REQUEST" = "false" ]
 then
+	npm i -g gulp
+	gulp
 	git submodule add -b gh-pages https://${GH_OAUTH_TOKEN}@github.com/${GH_OWNER}/${GH_PROJECT_NAME} site > /dev/null 2>&1
 	cd site
 	if git checkout gh-pages; then git checkout -b gh-pages; fi