Periscope update finally lets you change your mugshot

It's hard to imagine that Periscope, Twitter's almost preempted livestreaming service, is six weeks old now. But that's exactly the message that is being sent out now that uipdate 1.0.4 is starting to roll out to users. The update brings in features some of which, in all honesty, should have been there since day one, like being able to change …