Fix docs redirect to point to valid link.

This fixes the link to the documentation from the README.

Author: frewsxcv

.travis.yml

@@ -28,7 +28,7 @@ after_success: |
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
   cargo doc &&
-  echo "<meta http-equiv=refresh content=0;url=`echo $TRAVIS_REPO_SLUG | cut -d '/' -f 2`/index.html>" > target/doc/index.html &&
+  echo "<meta http-equiv=refresh content=0;url=coreaudio/index.html>" > target/doc/index.html &&
   sudo pip install ghp-import &&
   ghp-import -n target/doc &&
   git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages