Add html-pipeline-vimeo to 3rd party extensions [ci skip]
Add html-pipeline-vimeo to 3rd party extensions [ci skip]

closes #216

github/html-pipeline,jch/html-pipeline,terracatta/html-pipeline,kbrock/html-pipeline,github/html-pipeline,jch/html-pipeline,kbrock/html-pipeline,gjtorikian/html-pipeline,gjtorikian/html-pipeline,terracatta/html-pipeline