Fixing doc publishing

Set correct path for publish script and also moved `after_success` section to `script` section so that errors will be reported.
Fixes #33
[semver patch]

Author: nfriedly

.travis.yml

@@ -10,8 +10,7 @@ script:
 - npm test
 - sed -i "s/\/master\//\/$TRAVIS_BRANCH\//g" README.md
 - npm run doc
-after_success:
-- jsdoc/publish.sh
+- scripts/jsdoc/publish.sh
 - scripts/create_semver_tag.sh
 env:
   global: