Unicode fonts on GR-backend

[jaakkor2]

With Plots.jl 0.13.1, GR.jl 0.24.0, GR.version() 0.27.0 it is great that yformatter=:scientific almost works. On Windows I get bad fonts. Also, axis labels do not show unicode fonts (but can be worked around by \\mu for μ, for example.

using Plots
gr()
x = linspace( 0.0,5.0,50 )
plot( plot( x, [ x, x.^2 ], grid = true, lab=[ "foo" "bar" ], color=[ :cyan :purple ], xaxis="Length (μm)", yaxis="y-value", lw=2 ), plot( x, 1e6*[ exp.(x), exp.(x.^2) ], grid = true, lw = 1, yformatter=:scientific, leg = false, yaxis="my yaxis label" ), layout=(2,1) )

[improbable-22]

Perhaps of interest, I had a go at making GR replace β with \\beta etc automatically here: jheinen/GR.jl#78 . This could also be done within Plots I'm sure.

[jaakkor2]

Closing this issue, as now yformatter=:scientific works. The unicode issue still exist and is open here
#791