Fix plotting on *NIX machines

[odow]

Closes #145

[odow]

Hi @aferragu do you mind testing that this works?

You can either checkout this PR using Julia:

Pkg.checkout("SDDP", "fix-visualize")

Then, once this branch is merged you can get back to master by:

Pkg.free("SDDP")
# or 
Pkg.checkout("SDDP", "master")

Alternatively, if you know much about Git you can just do it via the command line.

[codecov]

Codecov Report

Merging #146 into master will increase coverage by 0.13%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
+ Coverage   90.58%   90.71%   +0.13%     
==========================================
  Files          29       29              
  Lines        1392     1390       -2     
==========================================
  Hits         1261     1261              
+ Misses        131      129       -2

Impacted Files	Coverage Δ
src/visualizer/visualize.jl	28.57% <ø> (ø)	⬆️
src/visualizer/visualize_simulation.jl	87.5% <0%> (+9.72%)	⬆️
src/visualizer/visualize_value_function.jl	93.65% <0%> (ø)	⬆️

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[aferragu]

That should do it. I can confirm it works on *NIX. Thanks!

[odow]

Thanks @aferragu! If you know anything about JavaScript, #36 needs work :)