Travis Deploy Script: Add git command to add all new untracked files …

…before gh-pages commit (pull w3c#962)

Some generated files, such as the example index file, were not getting included in the commit to gh-pages.

scripts/travis-deploy.sh

@@ -9,5 +9,6 @@ echo 'Pushing built changes'
 git config --global user.email "[email protected]"
 git config --global user.name "michael-n-cooper"
 git config remote.origin.url "https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git"
+git add --all
 git commit -am "Generated by TRAVIS-CI ${TRAVIS_COMMIT}" -m "${TRAVIS_COMMIT_MESSAGE}"
 git push --set-upstream origin gh-pages > /dev/null 2>&1