Updated Plugin: Effective Deployment Distance

I've switched the logic to use colour, rather than opacity, to denote the effective deployment distance. Maybe it's just me, but I find it easier to get a feel for the strong / average / poor / awful deployments, this way. Since the original threshold was below 90%, I'm using red for less than 30% (12 metres), orange for less than 60% (24 metres) and yellow for less than 90% (36 metres).