detail h3s are the same on mobile + desktop
Merge pull request #736 from spasovski/fweight

detail h3s are the same on mobile + desktop
bump gulp
remove process.env.port from config now that it's in gulp
improve CSS for site navigation bar (bug 1082161, bug 1083613, bug 1083614)

* remove unused rules, optimise selectors, and make things more OOCSS-y
* improve navigation hover states (bug 1082161)
* use CSS instead of JS to toggle category drop-down on desktop (bug 1083613)
* add borders to desktop navigation items (bug 1083614)
* fixed CSS to actually hide the link outlines on focus
* remove `cur-cat` class and use more descriptive classes
* remove specificity all over the space to reduce complex cascading
* considerable cleanup to `sprite-background-position` for category icons
Merge pull request #727 from cvan/nav-tweax

improve CSS for site navigation bar (bug 1082161, bug 1083613, bug 1083614)
bump gulp for serve speed
use faster css gulp watcher (bug 1091421)
bump gulp for catching stylus errors better
remove underscore dep
farewell official nunjucks, t'was but a dream
update gulpfile comments