Merge pull request #7 from azuqua/develop

no sudo

.travis.yml

@@ -6,6 +6,10 @@ notifications:
     on_success: never
     on_failure: never
 sudo: false
+branches:
+  only:
+    - master
+    - develop
 node_js:
 - '7'
 - '6'
@@ -20,11 +24,13 @@ after_script:
 - |
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
+  echo "Building docs for GH pages..." &&
   grunt docs &&
   echo "<meta http-equiv=refresh content=0;url=`echo $TRAVIS_REPO_SLUG | cut -d '/' -f 2`/index.html>" > doc/index.html &&
-  sudo pip install ghp-import &&
+  pip install ghp-import &&
   ghp-import -n doc &&
-  git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
+  git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages &&
+  echo "Finished building docs for GH pages."
 env:
   global:
     - CXX=g++-4.8