[FEATURE REQUEST] Make Volume UP signal take a picture or start a video

Hello,
Would it be possible to make the Megapixels app take a picture or start a video, when it detects that the volume has been raised?
Holding a phone horizontally imitates a camera and it's very natural to press the Volume UP key to take a picture.
Also, there are this selfie sticks that connect via Bluetooth. When connected they also send a Volume UP signal to the phone.
Plus, I think, no matter how you manage to increase the volume, if Megapixels is open it should take a picture. For example, if you make a really hacky way of increasing the volume on your phone from the computer, if Megapixels is open on the phone, it should take a picture.