Add definition for Phaser.Device.edge
Add definition for Phaser.Device.edge

Was missing

Closes #614

Thanks @highlyinteractive

yupaul/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce,photonstorm/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce