This reverts 4d619d71b1 (see #1527), going back to what we had after e13075f6ff (see #881). To avoid the 404 in the hosted examples, the css is copied to the same relative path when hosted as during development.
4d619d71b1
e13075f6ff
Before this change, all the examples try to load ../css/ol.css, even in hosted mode, where they should load ../build/ol.css instead.