fix coveralls integration

Author: mikey179

.coveralls.yml

@@ -0,0 +1,2 @@
+coverage_clover: docs/phpunit/clover.xml
+json_path: docs/phpunit/coveralls-upload.json

.travis.yml

@@ -9,10 +9,10 @@ before_script:
   - cp .travis.composer.config.json ~/.composer/config.json
   - composer self-update
   - composer install
-  - composer require satooshi/php-coveralls:dev-master
+  - composer require satooshi/php-coveralls
 
 script:
   - vendor/bin/phpunit --coverage-text
 
 after_script:
-  - vendor/bin/coveralls
+  - travis_retry vendor/bin/coveralls