Road to 1.0

[timholy]

I'd like to move the whole JuliaImages stack to version numbers >= 1.0 (see JuliaImages/Images.jl#825). Let's use this issue to collect plans for breaking changes in the near future.

Items on my agenda:

• decide whether we're happy with the status quo WRT Gray arithmetic #38
• expanded issue: Important decisions with respect to color math (please comment) #126

[kimikage]

Why don't you delete the methods with the old (deprecated) names of SpecialFunctions?

[timholy]

Didn't know they were there. This is the hazard of having warnings only print with --depwarn=true.