Adding .gitignore to project skeleton

A .gitignore is missing in the projec folder.

Next I propose the including following content for the .gitignore:

• https://github.com/github/gitignore/blob/master/Python.gitignore
• https://github.com/github/gitignore/blob/master/Global/MicrosoftOffice.gitignore
• https://github.com/github/gitignore/blob/master/R.gitignore
• https://github.com/github/gitignore/blob/master/Scala.gitignore
• https://github.com/github/gitignore/blob/master/Sass.gitignore
• https://github.com/github/gitignore/blob/master/Global/Emacs.gitignore
• https://github.com/github/gitignore/blob/master/Global/Vim.gitignore
• https://github.com/github/gitignore/blob/master/Global/Vagrant.gitignore