Updates for Coveralls. Also always installing a local composer as the Travis one is giving us issues

.travis.yml

@@ -6,14 +6,15 @@ php:
   - 5.5
 
 before_install:
-  - composer self-update
-  - composer install --dev --no-interaction
+  - curl -s http://getcomposer.org/installer | php
+  - php composer.phar install --dev --no-interaction
   - pyrus install pear/PHP_CodeSniffer
   - phpenv rehash
 
 script:
+  - mkdir -p build/logs
   - phpcs --standard=PSR2 src/
-  - phpunit
+  - php vendor/bin/phpunit -c phpunit.xml.dist
 
 after_script:
   - php vendor/bin/coveralls

phpunit.xml.dist

@@ -12,4 +12,9 @@
             <directory suffix=".php">./src/GeoIP2/</directory>
         </whitelist>
     </filter>
+
+    <logging>
+        <log type="coverage-clover" target="build/logs/clover.xml"/>
+    </logging>
+
 </phpunit>