run validation script on all PR branches

after_deploy does not trigger on PR branches

Signed-off-by: AutomatedTester <dburns@mozilla.com>

.travis.yml

@@ -1,13 +1,10 @@
 language: c
 script: ./validate
 sudo: false
-branches:
-  only:
-    - gh-pages
 env:
   global:
     - URL="https://w3c.github.io/webdriver/echidna-manifest.txt"
     - DECISION="https://lists.w3.org/Archives/Public/public-browser-tools-testing/2015JulSep/0009.html"
     - secure: YyDoEwlD8azykD+mq6TcNi7tQ93M7+R6qx0EqPd/z7M6KSFNRu8SdMYNkHI8XSSf0qLfOUPhm0t92hJkfte/wF33JFTeux/U51e1I4gLql/nuCddR4FreTFd00XSbAH+zZg9Kffb9pah60UyyM1ndOzDedy+lRdEe7QT8iseae0=
-after_success:
+after_deploy:
   - curl "https://labs.w3.org/echidna/api/request" --data "url=$URL" --data "decision=$DECISION" --data "token=$TOKEN"