Adding project 4

[oargueso]

Pull Request Checklist

Story title: Unpaid overtime in Spain

My pitch issue is #176

My story issue is #189

Story Issues

• [x] My pitch issue checklist is complete
• [x] My story issue checklist is complete

  Directory Format

• [x] There is a folder in /projects/ that is my full name
• [x] I have included a BIO.yml in the folder named after me that includes name and contact information (see examples)
• [x] Inside of that folder I have another folder just for this project

  Visualization

• [x] My visualization has a title on it
• [x] I have cited by data source on the visualization
• [x] My visualization has my name/web site/twitter handle on it (only needs one)
• [x] I have exported my visualization as a png file

  STORY.md

• [x] I have included a STORY.md
• [x] I have included a front matter section with the a title and summary
• [x] I have properly linked my image, with a format like ![](image.png)
• [x] If necessary, I have written text and such

  Other files to include

• [x] README.md, linking to my data set (if possible) and giving a brief overview of how I accomplished my task
• [x] DIARY.md, the notes you were keeping for yourself while working on the projects (problems, solutions)
• [x] Any IPython/Jupyter Notebook files
• [x] Any PDF files you exported along the way
• [ ] Any images or other files from your process