title: How to install the C++20 range library from github
body: <p>I would like to use the <a href="https://github.com/ericniebler/range-v3" rel="nofollow noreferrer">range-v3</a> library in my project, but i don't understand how. The <a href="https://ericniebler.github.io/range-v3/index.html" rel="nofollow noreferrer">installation description</a> says the following:</p>
  
  <blockquote>
    <p>This library is header-only. You can get the source code from the
    range-v3 repository on github. To compile with Range-v3, just <code>#include</code>
    the individual headers you want.</p>
  </blockquote>
  
  <p>Does that mean I can copy and paste the needed header files and add the filepath to my CMake file? I am a bit confused, because I never included third party library.</p>