Syntax tables rely on precise monospace font rendering
with regard to font-size and especially line-height.
This applies more specific selectors, in an attempt to
have Firefox render identically to Chrome.
* Create template for spec pages
* Adapt syntax-table styles to Bootstrap
* Reposition type/size annotations at col 86 (and update README.md)
* Let Bootstrap style breadcrumb trails
* Unrelated: abstract footer to an _include