Add external code coverage

Author: mvriel

.scrutinizer.yml

@@ -2,6 +2,7 @@ before_commands:
     - "composer install --no-dev --prefer-source"
 
 tools:
+    external_code_coverage: true
     php_code_sniffer:
         config:
             standard: PSR2

.travis.yml

@@ -12,11 +12,15 @@ matrix:
     - php: hhvm-nightly
 
 script:
- - vendor/bin/phpunit
+ - vendor/bin/phpunit --coverage-clover=coverage.clover
 
 before_script:
  - composer install --no-interaction --prefer-source --dev
 
+after_script:
+  - wget https://scrutinizer-ci.com/ocular.phar
+  - php ocular.phar code-coverage:upload --format=php-clover coverage.clover
+
 notifications:
   irc: "irc.freenode.org#phpdocumentor"
   email: