Whoops, add missing custom biblio file.
Merge pull request #67 from yoavweiss/gh-pages

Small fixes
Bikeshed fixes.
Update CONTRIBUTRING to talk about Bikeshed instead.
Typo. Closes #70. Closes #71.
Whoops, was talking about the wrong element.
Switch the attr name to srcset.
Rewrite/rework examples.
Kill the now-irrelevant final example.