Organize all settings and properties in a central file
From discussion: @BZoennchen @hm\-kleinmei
* Find out what and where property files are read into Vadere (and actually used). Make a list and report files that seem irrelevant and seem subject to remove.
* One example for a property file: the file `VadereGui/resources/config/global_config.properties`
* Note: there can also be other file formats (not necessarily end with `.properties`)
**Out aim is to centralise all "internal" properties (that are not given to the user)**
* Create this new central properties file in `.ini` format; use the [ini4j](http://ini4j.sourceforge.net/download.html) package, maybe make a little research if there are better ones.
* Translate all properties from properties (likely from different file formats) that are scattered in the Vadere project) into the new `.ini` format.
* Read this new file into Vadere and define a class that returns the set options
* Make this class globally accessible via a single object that is instantiated once via the [singleton pattern](https://javabeginners.de/Design_Patterns/Singleton_-Pattern.php)
#### Current list of files that may contain relevant configutation
See also `.java` files where there seem relevant global configs. One such file is the class
* `DataProcessingJsonManager`, there are many `private static final` which are hard coded, but could be in a central spot.
* `OutputFile` contains settings about further info in the column name.
#### Current list of deprecated/unused setting files and locations
n/a (TODO)
issue