Add CareerBuilder For Employers Project

[toastercup]

• Adds CareerBuilder For Employers to PROJECTS.md, as per discussion with @justin808
  • React components are not in use across the entire site quite yet. For example, the homepage does not yet feature a component.

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This change is 

[coveralls]

Coverage remained the same at 99.329% when pulling c1ddd02 on toastercup:add-careerbuilder-employer-project into 2b8ee6a on shakacode:master.

[justin808]

Thanks!!! 👍