docs>components>thumbnails headings
docs>components>thumbnails headings

BS3 commits: 3c4a8ea61b6c034848e5e336ac7ae05ffb16e4e5

2947721120/googlebt4,todc/todc-bootstrap,2947721120/todc-bootstrap,mozillo/todc-bootstrap,ztx1491/todc-bootstrap,up2vs/todc-bootstrap,todc/todc-bootstrap,aaroncnhk/todc-bootstrap,todc/todc-bootstrap