Tweak travis config

Author: alexcrichton

.travis.yml

@@ -1,4 +1,5 @@
 language: rust
+sudo: false
 script:
   - cargo build --verbose
   - cargo test --verbose
@@ -8,7 +9,7 @@ after_success: |
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
   echo '<meta http-equiv=refresh content=0;url=git2/index.html>' > target/doc/index.html &&
-  sudo pip install ghp-import &&
+  pip install ghp-import &&
   ghp-import -n target/doc &&
   git push -qf https://${TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages &&
   rm target/doc/index.html &&