Merge branch 'master' into expiring-event

    Conflicts:
    	src/Makefile
    	src/Makefile.dep
    	src/redis.c

    rename myredis... to redisplus...
    rename product name to Redis+
    update readme or change file extention to .md
    added feature can retrieve expiing event
    rename product name to Redis+
    update readme or change file extention to .md
    added feature can retrieve expiing event