++ Preliminiary HTTP2 support for http\Client (libcurl with nghttp2 support)
++ Improved performance of HTTP info parser (request/response line)
++ Improved performance of updating client observers
++ Improved performance of http\Env\Response output to streams
++ Added http\Header\Parser class
++ Added http\Client::configure() method accepting an array with the following options for libcurl:
+ . maxconnects (int, size of the connection cache)
+ . max_host_connections (int, max number of connections to a single host, libcurl >= 7.30.0)
+ . max_pipeline_length (int, max number of requests in a pipeline, libcurl >= 7.30.0)
+ . max_total_connections (int, max number of simultaneous open connections of this client, libcurl >= 7.30.0)
+ . pipelining (bool, whether to enable HTTP/1.1 pipelining)
+ . chunk_length_penalty_size (int, chunk length threshold for pipelining, libcurl >= 7.30.0)
+ . content_length_penalty_size (int, size threshold for pipelining, libcurl >= 7.30.0)
+ . pipelining_server_bl (array, list of server software names to blacklist for pipelining, libcurl >= 7.30.0)
+ . pipelining_site_bl (array, list of server host names to blacklist for pipelining, libcurl >= 7.30.0)
+ . use_eventloop (bool, whether to use libevent, libcurl+libevent)
++ Added http\Client::getAvailableOptions() and http\Client::getAvailableConfiguration() methods