Exclude jade files from docs

BS3 commits: 7ef1bebb559b179550e3442d0ef7e0eceb638ba4
Fix #12656: add @blockquote-font-size

BS3 commits: 91b76e5247ef259b8c51672ed95dbbcfd08b7aac
grunt

BS3 commits: b683433f672525cbbe25a4d5aa928610a66ea030
Omit semicolons consistently in docs

BS3 commits: 06e6affa4ab86ea67fefc59386e6e2d6c53cc209
Update holder.js to v2.3.1.

BS3 commits: 5d8491ac9fa1c89e649b28e0ba1b860e7fe07607
grunt

BS3 commits:
grunt

BS3 commits: 26e2d7cdc948dfdd3b0646ed29c6d5c37d8df710