ways to autonomous localization of turtlebot

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Hello guys,

i am working on turtlebot with ROS Indigo 14.04. I have created a map of an environment using gmapping and the maps turned out to be great. I am using this map for autonomous navigation and this works great too. But whenever i start the robot i have to manually localize it using RViz using AMCL. Is there any way i can make this process automated. I have seen a few videos where people localize the robot autonomously using voice commands like shown in this video

Can anyone point me in the right direction on how i can automate this process?

Thanks guys.