Add gong fu brewing mode to the timer #35
Description
Gong fu style brewing differs from western brewing significantly when it comes to timing, and right now the app is heavily biased towards the western style. A separate mode for the timer should be added; this mode could automatically reset and add 5-10 seconds to the previous time once it finishes.
Further down the line I should add functionality to let the user completely customize a gong fu session for a specific tea, but for now they should at least be able to set global defaults for gong fu brewing.