add composer auth to travis

this should remove 'could not download package from source' message

.travis.yml

@@ -3,20 +3,16 @@ php:
   - 5.5
   - 5.6
   - hhvm-nightly
-
 matrix:
   allow_failures:
-     - php: hhvm-nightly
-
+    - php: hhvm-nightly
 sudo: false
-
 addons:
-  postgresql: "9.3"
-
-install: 
-   - composer install --dev --no-interaction
-   - cp Tests/Fixtures/App/app/config/parameters.travis.yml Tests/Fixtures/App/app/config/parameters.yml
-  
+  postgresql: '9.3'
+install:
+  - composer config -g github-oauth.github.com $GITHUB_COMPOSER_AUTH
+  - composer install --dev --no-interaction
+  - cp Tests/Fixtures/App/app/config/parameters.travis.yml Tests/Fixtures/App/app/config/parameters.yml
 before_script:
   - psql -c 'create database test0;' -U postgres
   - psql -d test0 -c 'CREATE EXTENSION unaccent;' -U postgres
@@ -24,9 +20,10 @@ before_script:
   - php Tests/Fixtures/App/app/console.php assets:install Tests/Fixtures/App/web
   - php Tests/Fixtures/App/app/console.php doctrine:migrations:migrate --no-interaction
   - php Tests/Fixtures/App/app/console.php doctrine:fixtures:load --env=test --no-interaction
-
 script: phpunit --coverage-text
-
 notifications:
   email:
-     - info@champs-libres.coop
+  - info@champs-libres.coop
+env:
+  global:
+    secure: cTLFyo5WBqz9r+cfvYB9JozISdiXWBQ/feLmQQjOEjj+CiQteKYGh7oQkePyJJRdi95JO9jyXG8yiKGcEcVNLgwShLkwKno3iyiWOIDVl0mPmFUKbQPd9P3UVWpCiL3oH1JVTFd7uz6Mq+eUMrETeLa/3sxoxlnmre8ESqDIIEo=