Quote parameters to pandoc

[bersace]

Fixes passing arguments with space like beamer option "notes on second screen".

[bersace]

Cf. Pythonity/icon-font-to-png#10

[daamien]

pandoc-latex-tip is an interesting pandoc filter but AFAIK it is not used at the moment in our document production chains. We might as well remove it and avoid all the pillow/fontawesome trickery....

[bersace]

@daamien pourquoi l'installe-t-on alors ?

[daamien]

@bersace :

TL;DR : Good idea, Bad execution

During the early development stages of the dalidoc3 toolchain, I was optimistic and I tried to add as many cool features as possible. The pandoc-latex-tip is a nice thing to have but in practice its a bit redundant with pandoc-latex-environment and I failed to promote the additional syntax it required and never convinced anyone to use actually it....

I have kept it in the pandocker machine until then because I still had the secret hope to push it again at some point. But really if it creates problems in itself, I think we should get rid of it.