Now ignoring the OSX's .DS_Store files
Revert "Now ignoring the OSX's .DS_Store files"

This reverts commit c8fc9d027ed84feddba2833da708af05d9da1063.
Now ignoring the OSX's .DS_Store files
Adding chapter 2 source file
Merge branch 'master' of github.com-ketouem:Ketouem/flask-web-development