anchor.diff:  chooses the correct implementation for you! This is a first example of a
   __container free numerical algorithm__.
   
  -=== Using FELTOR on Windows
  -FELTOR has been developed mostly on Linux machines. Recently, it has
  -become possible to develop on Windows using https://www.visualstudio.com/[Microsoft Visual Studio].
  -____
  -Unfortunately, the msvc compiler only supports an outdated OpenMP version so
  -consider a performance penalty of approximately factor 2, when running the OpenMP backend on Windows.
  -____
  -
  -For the download of the library and its dependencies described <<sec_quickstart,previously>> you may want
  -to activate Bash in Windows 10 or
  - consider a software solution like https://desktop.github.com
  -____
  -The include paths need to be set in the project properties.
  -Please also enable the use of intrinsic functions, the AVX2 instruction set and
  -activate OpenMP support.
  -It is important to set the Platform to x64!
  -____
  -
   === Running a FELTOR simulation
   
   Now, we want to compile and run a simulation program. To this end, we have to
  
positive.code: == 1. Quick start guide [[sec_quickstart]]
  This guide discusses how to setup, test and benchmark the FELTOR library
  installation.
  We then present how to use the physical software package,
  which requires additional software to be installed on the system.
  
  === System setup
  
  Go ahead and clone the repository into any folder you like
  
  [source,sh]
  ----
  
negative.code: 
  Some desktop applications in FELTOR use the
  https://github.com/mwiesenberger/draw[draw library] (developed by us
  also under MIT), which depends on
  http://www.glfw.org[glfw3], an OpenGL development library under a
  BSD-like license. There is a `libglfw3-dev` package for convenient installation. Again, link `path/to/draw` in the `include` folder.
  
  We are now ready to compile and run a simulation program
  
  