Created by: findmyway

Hi guys,

I would like to add a Julia wrapper for VisualDL.

Previously I've written a wrapper for VisualDL by leveraging PyCall.jl. Obviously there's a little overhead.

Recently I have spent some time on how to use the C++ SDK of VisualDL by using CxxWrap.jl. And it works fine.

This PR should give you a glimpse of the up-coming changes to support Julia. Before updating vdljl.cc to support more datatypes (histogram, text, voice...), I would like to hear your thoughts/suggestions.

Cheers!