New scientific theme with frame, and axes label alignment

[mmikhasenko]

It would be nice to create a theme with settings below.
I'd save me a lot of time, not adjusting the header of every script.

theme(:wong2, minorticks=true, grid=false, frame=:box,
    guidefontvalign=:top, guidefonthalign=:right,
    foreground_color_legend = nothing,
    legendfontsize=9, legend =:topright,
    xlim=(:auto,:auto), ylim=(:auto,:auto), lab="")

Example

julia> Plots.showtheme(:boxed)

[BeastyBlacksmith]

Would be good to add a picture to the README as documentation

[mmikhasenko]

sure thing, adding to the header, will also propagate to the README.md