Further refactor libPMacc

[BenjaminW3]

Another round of refatoring libPMacc includes:

• reorder includes
• correct spelling errors
• pragma once instead of header guard for affected files

[ax3l]

@BenjaminW3 thank you for the updates.

to be honest, most of the points you put (white space changes, include guards) we usually submit under a anonymous/bot/script username and don't add us as an author: #755

example in your case:

GIT_AUTHOR_NAME="Tools" GIT_AUTHOR_EMAIL="[email protected]" \
  git commit --amend
  git push -f [...]

that's just to keep the statistics fair, I hope you don't mind ;)

include order and spelling errors are totally fine as a regular commit on your user name :)

[ax3l]

and other small wish: when you update the end-of-line white spaces, can you pls run over the examples/ directory, too? we forgot this last time in 520

[BenjaminW3]

Thanks for the description. I did not know where to find this information.
For white-space-only changes I already had not edited the authors.
See for example src/libPMacc/include/traits/Limits.tpp, src/libPMacc/include/traits/GetValueType.hpp, ...
I will attribute those things to the user 'Tools'!

[ax3l]

thanks that is fantastic!
(I did not check all year/author lines - that is correct, too :) )

[BenjaminW3]

I moved the whitespace changes into #887.

[ax3l]

thx!

[psychocoderHPC]

big thx