Changes with emqtt 0.1.5                                         05 Jan 2012

    *) Bugfix: remove QOS_1 match when handle PUBREL request 
	
    *) Bugfix: reverse word in emqtt_topic:words/1 function


Changes with emqtt 0.1.4                                         04 Jan 2012

    *) Bugfix: fix "mosquitto_sub -q 2 ......" bug

    *) Bugfix: fix keep alive bug

Changes with emqtt 0.1.3                                         04 Jan 2012

    *) Feature: support QOS2 PUBREC, PUBREL,PUBCOMP messages

    *) Bugfix: fix emqtt_frame to encode/decoe PUBREC/PUBREL messages


Changes with emqtt 0.1.2                                         27 Dec 2012

    *) Feature: release support like riak

    *) Bugfix: use ?INFO/?ERROR to print log in tcp_listener.erl
 

Changes with emqtt 0.1.1                                         24 Dec 2012

    *) Feature: use rebar to generate release

    *) Feature: support retained messages

    *) Bugfix: send will msg when network error

Changes with emqtt 0.1.0                                         21 Dec 2012

    *) The first public release.