Add disable sleep

My I dont have much of a problem using this app except for when Im doing my hair it times out and my hands are all full of product and it gets all over the keyboard when I have to wake the screen every 5 mins and Im ot going to adjust the settings in my preferences just to change it back when Im not using it. It helps me out a lot when someone is in the washroom.

makilovessushi about Mirror HD, v1.0