Currently the output at runtime produces, for instance, the following:

PIConGPUVerbose PHYSICS(1) | Courant c*dt <= 1.66765 ? 1
PIConGPUVerbose PHYSICS(1) | species e: omega_p * dt <= 0.1 ? 3.56797e-08

The way the output is formatted I interpret it as a "question to the code", i.e., "Is c*dt <= ?" To which a natural answer would be "Yes/No" or "True/False" and not

The WarpX documentation (esp. the theory part) uses a mix of SI units, Gaussian units, natural units, in different sections/equations.

We should standardize the whole documentation so that SI units are used everywhere.

Idea:

• documentation (html and pdf) is forced-pushed to the gh-pages branch of the repository by travis-ci, on every master branch which has passed the tests.

Benefits:

• No commercials on read-the-docs
• failing doc builds are easier detected.
• Full access to page creation (styles, links,...)
• New postpic webpage would then be: https://skuschel.github.io/postpic