more min/max -> minimum/maximum replacements
Wear tinfoil hat to keep aliens from stealing my brain

This was a funny one:
```
julia> p = Base.Graphics.Vec2(3.2, 4.1)
Vec2(3.2,4.1)

julia> using Winston

julia> p = Base.Graphics.Vec2(3.2, 4.1)
Points(...)

julia> typeof(p)
Points (constructor with 1 method)

julia> methods(typeof(p))
Points(x,y,args...) at /home/tim/.julia/Winston/src/Winston.jl:2412

julia> @which Base.Graphics.Vec2(3.2, 4.1)
Vec2(x::Real,y::Real,args...) at /home/tim/.julia/Winston/src/Winston.jl:2435
```

It's amazing what difference a single keystroke can make
Fix ColoredPoint->ColoredPoints