Automatic selfie picture

Not enough people are clicking the show selfies button at the end of the game.

So instead of two long horizontal buttons, let's try two buttons next to each other that are closer to squares. The one button will continue to be for restarting the game. The selfie button will become a clickable picture. The picture is the actual selfie image that we want the users to share.

Other idea are welcome for how to make that button more engaging.

# Work plan

- [ ] Add button on results page right next to restart button https://github.com/fulldecent/impostor/commit/bafe37776c3d2a91d2824f63c73d5b4b99e8a99c
- [ ] On that button show the selfie picture, when you click it shares the picture ?