httpclient support skipPattern

[prefersimple]

We using this project in our APM now. When using rule of httpclient, we need to skip some URL which is not cared, so we want to support skipPattern which is similar to the implement of 'servlet'.

public static boolean isTraced(final HttpRequest httpRequest) {
if (skipPattern == null)
return true;
final String url = httpRequest.getRequestLine().getUri();
return !skipPattern.matcher(url).matches();
}