Renamed HttpAsyncClientWithFuture to FutureRequestExecutionService; moved implementation classes to o.a.h.impl.client package

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1463471 13f79535-47bb-0310-9956-ffa450edef68
HTTPCLIENT-1331: made timeout value less aggressive

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1463472 13f79535-47bb-0310-9956-ffa450edef68