added performance analysis 2013
home page ready for release
validated `standards/index.html`
Merge branch 'math7-old' into math7
revamped structure of /index.html

TODO: disperse content from /home/index.html into other pages; then
delete.
added drop-cap scheme
updated intro content to each 'portal' page, moved files

TODO:
- finish ‘portal’ pages content, and for fuck sake get rid of the
`<details>` elements!
minor changes to main files
updated styles for `.nonnormative`, figures, and block quotes; added `dltable` examples

TODO
- `.dltable*` classnames shouldn’t be style-specific; use -small, -med,
-large, etc
updated drop caps, aside, and dl schemes. started dl doc meta

TODO: finish dl document metadata scheme
rewrote all portal pages HTML
fixed breadcrumbs concept

TODO: merge breadcrumb styles into `design` branch
added support; updated todo
Merge branch 'homepage' into design
recompiled less
Merge branch 'math7' into dev
Merge branch 'design' into dev
updated breadcrumb styles
updated breadcrumbs on html pages
added warmups; updated proportions unit overview