Fixes #631: Speed up Travis tests by removing XDebug

.travis.yml

@@ -13,6 +13,9 @@ php:
 
 env: TMPDIR=/tmp
 
+before_script:
+ - phpenv config-rm xdebug.ini || return 0 ; fi
+
 install:
  - if [[ "$TRAVIS_PHP_VERSION" == "5.2" ]]; then sh ./tests/php52_install_dependencies.sh; fi
  - phpenv rehash