title: When should i create a new branch?
body: <p>I am using git as the first time for a versioning system.
  I am starting a new project, and therefore to experiment a little bit with the technologies used in the project (hello world examples...) i want to create something like a "playground" branch. Is it common to create a new branch "playground" or should i just create a folder named playground in the master branch?</p>
  
  <p>regards</p>