swoole-1.7.8-stable

• Fixed swoole_http_server::on no implementation parent class methods
• Fixed cannot read cookie in swoole_http_server
• Added swoole_http_server support to POST RawContent
• swoole_timer_after interface can pass a user parameter
• swoole_client->recv and onReceive zero copy
• Fixed swoole_table->set cannot be set more than 64K string
• Fixed open_length_check connection memory buffer is not reset bug
• Added dispatch_mode=4/5, dispatch data by client ip and uid
• Event callback function exception error level changed from E_WARNING to E_ERROR