translation update

PSR-2 for extension plugin

fixed typos

visibility declarations in plugins

line lengths shortened

This makes sure all files use line lenghts shorter than 120 characters.

This is a quick fix. It might not always be the nicest change.

remove DOKU_INC checks

There is no need for this check, since these files should not have any
main code that is executed on direct call.

Fixes PSR1.Files.SideEffects.FoundWithSymbols

translation update

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fix and delete some issues from the translation check

https://www.dokuwiki.org/teams:i18n:translation-check

translation update

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