[ProxyUrl] add PHPDoc to UrlMatcher
[ProxyUrl] change ProxyUrlFactory::create() to pass valid arguments to a ProxyUrl object
[EventListener] change ProxyUrlRewriteListener to support http/https schemes for proxy urls
[DependencyInjection] change Configuration to fix the error message for malformed URLs
[DependencyInjection] change Configuration so that a proxy URL cannot contain port number
[Composer] add packages to "require-dev" for testing
[tests] add functional tests for URL rewriting features
[Eclipse] change PHP Build Path for testing
[ProxyUrl] change ProxyUrlFactory so that different behavior of parse_url() between PHP >= 5.4.7 and PHP < 5.4.7 is fixed
[ProxyUrl] change ProxyUrlFactory so that different behavior of parse_url() between PHP >= 5.4.7 and PHP < 5.4.7 is fixed
[DependencyInjection] change Configuration to use ProxyUrlFactory::parseUrl() for validation
add .travis.yml