add `order` property to enterprise docs
Copy pages into parent sections in the content object, sorting them by `order` if the frontmatter property is present.
update the nav template to use ctx.section.pages instead of ctx.pages
add favicon
add getting started section
Merge pull request #44 from linclark/video-getting-started

[WIP] add getting started video series
merge master
Merge pull request #29 from npm/page-sorting

[WIP] Page Sorting
move `order` to the top of each frontmatter block
list pages in order per section in TOC
use a less rigid page ordering policy
build content before the service starts
allow order to be displayed in TOC with displayOrder property
add editorial info to readme
Merge pull request #49 from npm/sorting-fixes

Moar Sorting
Reordering enterprise and adding some titles
only display sections in TOC if they contain pages
Merge pull request #50 from npm/hide-empty-sections

only display sections in TOC if they contain pages
Merge branch 'master' of github.com:npm/docs.npmjs.com into ljv-reorder-enterprise
Rewrapping to avoid markdown breakage of html