Added Cards Against Humanity info

[nyette]

This is a modified version of the Contributing Guidelines.

This pull request adheres to the repository's Code of Conduct.

• I am an employee of the company mentioned and confirm all included details are correct
• This PR contains housekeeping only (URL edits, copy changes etc)
• You know your alphabet - company is listed in alphabetical order in the README
• The company directly hires employees. No bootcamps / freelance sites / etc
• The company hires remote employees, or positions are available to remote workers and are clearly illustrated as such
• A company profile is included - Required for new additions. (This can be a basic outline but at least something please)
• Remote status has details regarding how the culture includes remote employees, how the company integrated remote workers, etc
• Region details the geographic regions in which this company's employees can reside. For more details see the instructions in the example company profile.
• How to apply details the best approach for new applications, page on site where open position are listed, and any other help available for job hunters

[dougaitken]

Don't think I've ever seen a job opening for them but worth completing the entry. Thanks @nyette

[nyette]

Glad I could help @dougaitken