Replace diagrams with mermaid.js

[martialblog]

Diagrams are now rendered with mermaid.js - with this change we can now more easily modify them in the future.

All diagrams can be written in mermaid and then be rendered with the mermaid-cli

cat _images/mermaid/central-vcs.mmd
graph RL
    subgraph CentralVCS
    C{{Version DB}}
    end
    C -->|Client A| D[File]
    C -->|Client B| E[File]
    C -->|Client C| F[File]

# Can also render svg
docker run -u `id -u`:`id -g` --rm -v $(pwd)/_images/mermaid:/data minlag/mermaid-cli -e png -i "/data/central-vcs.mmd"

Fixes #36

[martialblog]

@theFeu @htriem @mocdaniel I'd love some feedback on this. 📈

[martialblog]

I tried the showoff mermaid support with @@@render-diagram however, I wasn't able to get the diagrams to render in the correct size. I might be able to refactor that later though.

[theFeu]

as discussed offline
@martialblog will still update the gitflow workflow graphics so the colours match

[martialblog]

@theFeu I updated the images so that the colors stay the same.

[theFeu]

I'll assume you looked at it and would say it's ready to merge then!

Actually!
We could maybe scale the images for the Gitflow so that they are the same size and don't jump around anymore.
What do you think @martialblog ?

[martialblog]

I will give it a try

[theFeu]

If you want to, you can leave it to me, I have the right tools.
I'd do it tomorrow at lunch.

[martialblog]

I added some adjustments on a new commit

[martialblog]

@theFeu I'm waiting on your go to shipit

[theFeu]

GOGO

[martialblog]

Houston we are go for merge 🚀