Merge pull request #96 from akankaria/master

Adding submodule checkout in travis

Author: brianmc

.travis.yml

@@ -9,6 +9,7 @@ before_script:
     - pecl install xmldiff
     - composer install --prefer-dist --dev
     - chmod +x ./test-sample-codes.sh
+    - git submodule update --recursive
 
 script:
     - vendor/phpunit/phpunit/phpunit --coverage-clover=coverage.clover