Add scrutinizer code coverage

Author: pinepain

.scrutinizer.yml

@@ -0,0 +1,2 @@
+tools:
+  external_code_coverage: true

.travis.yml

@@ -27,4 +27,8 @@ before_script:
   - composer install
 
 script:
-  - vendor/bin/phpunit --coverage-text --configuration phpunit.xml
+  - vendor/bin/phpunit --coverage-text --configuration phpunit.xml --coverage-clover=coverage.clover
+
+after_script:
+    - wget https://scrutinizer-ci.com/ocular.phar
+    - php ocular.phar code-coverage:upload --format=php-clover coverage.clover

README.md

@@ -1,4 +1,8 @@
-# Weak-referenced data structures for PHP [![Build Status](https://travis-ci.org/pinepain/php-weak-lib.svg)](https://travis-ci.org/pinepain/php-weak-lib)
+# Weak-referenced data structures for PHP
+
+[![Build Status](https://travis-ci.org/pinepain/php-weak-lib.svg)](https://travis-ci.org/pinepain/php-weak-lib)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/pinepain/php-weak-lib/badges/quality-score.png)](https://scrutinizer-ci.com/g/pinepain/php-weak-lib)
+[![Code Coverage](https://scrutinizer-ci.com/g/pinepain/php-weak-lib/badges/coverage.png)](https://scrutinizer-ci.com/g/pinepain/php-weak-lib)
 
 This library is based on [php-weak][php-weak-ext] PHP extension and provides various weak data structures: