"exporting" save

[tpapp]

In the spirit of #62, it would be nice if PGFPlotsX.save would just work with less typing (or workarounds, like const something = ...). It is of course too generic to export as is. I was thinking of two alternatives:

1. rename it, eg pgfsave,

2. integrate it into a general mechanism like FileIO.jl

[KristofferC]

FileIO is not something I want as a dependency, see e.g.: JuliaPlots/Plots.jl#1379. Exporting pgfsave makes sense to me.

[tpapp]

I agree. Should we keep save (aliased to pgfsave, which is exported), or rename it? Renaming would be cleaner.

[KristofferC]

I don't think it is any harm keeping a non-exported save. It could be an alias to pgfsave or vice versa. If only, just to not bother people with unnecessary deprecation warnings.