Moved composer out of the private directory

Unsure if that's why I couldn't make the file, thinking of perhaps making the
log directory part of the directory structure instead of creating it on the
fly in Travis CI.

.travis.yml

@@ -12,8 +12,8 @@ install:
   - composer install
 
 script:
-  - mkdir -p .composer/build/logs
-  - phpunit --coverage-clover .composer/build/logs/clover.xml --bootstrap ./tests/bootstrap.php ./tests
+  - mkdir -p vendors/composer/build/logs
+  - phpunit --coverage-clover vendors/composer/build/logs/clover.xml --bootstrap ./tests/bootstrap.php ./tests
 
 after_script:
   - php .composer/bin/coveralls --config .coveralls.yml -v