basic test for the Writer class

check for opcache function before using it

Moved settings to their own namespace

replaced ptln() with echo

We used to use ptln to ensure the produced HTML source code is somewhat
readable, but with modern HTML inspectors this is no longer necessary
and makes the PHP source code

replaced ptln() with echo

We used to use ptln to ensure the produced HTML source code is somewhat
readable, but with modern HTML inspectors this is no longer necessary
and makes the PHP source code ugly.

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fixed the minimal tests we have

PSR2 adjustments for admin class

first go over the settings classes for PSR-2

introduce getType for Settings

moved language loading to the loader

adjusted basic loading saving in admin

stripped out all the session stuff

added Writer class for saving the config back to file

moved the whole settings class mechanism to it's own class

created a configuration Loader class

This replaces stuff in the Configuration class that hasn't been removed,
yet.

moved php parser to it's own file

start of refactoring the config plugin

split up all the files and added namespaces. everything broken

fixed broken tests

I also introduced an auto loaded namespace for the tests.

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

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