Make plots in examples update interactively

[mkborregaard]

As discussed on Gitter:

if you browse through https://evizero.github.io/Augmentor.jl/ and see figures just take a look the the "Edit on Github" to see how I do it.
all but the "Tutorials" are pretty much vanilla Documenter. The tutorials though are all custom stuff, generated markdown pages by "examples/*.jl" scripts. so unless you want to mess with Weave just ignore those
Christof Stocker
@Evizero
00:30
I actually use Plots to produce the image + gif on this page https://evizero.github.io/Augmentor.jl/gettingstarted/ . forgot about that
Michael Krabbe Borregaard
@mkborregaard
08:33
So you just include an @eval block that creates the image? Sweet.
Christof Stocker
@Evizero
11:00
pretty much yea, and then you include that image in the markdown as usual
you can also use an @example block for this and just end the lines that save the figure with # hide

[SaschaMann]

From #80:

Alternatively we could add all of the figures in our docs to our test examples, and link to those in PlotReferenceImages from here. If we just had a "latest" folder there. In fact, that may be the simplest solution overall.

[daschw]

Images are now generated during PlotDocs build. #145 ...

[mkborregaard]