Add buttons

[alexanderisme]

It could be useful to have an option that makes you using the volume buttons for the camera app.
It would be interesting to have an option where you could choose if:

• using the buttons to zoom

• using one of the buttons to take a picture (sometimes it is annoying to have to click on the screen to take the photo and using a side button could make it easier because you could keep the phone in your hand and take a picture with the same hand!)

• not using the buttons