Add Creative Commons License

Linked to same CC as Midas project
Merge branch 'gh-pages'

* gh-pages:
  Add Creative Commons License
Add Image Credits to README

Found these images on Google and used them because of their size and content displaying rotundas.
Added specific language about each photo source
Merge branch 'gh-pages'

* gh-pages:
  Added specific language about each photo source
  Add Image Credits to README