Replace small-menu.js with navigation.js inspired by Twenty Twelve.

Doesn't use jQuery, slightly easier to understand, uses a media query for max-width, rather than JS events making it faster to respond.
Change the search form text input to search type and add the basic style for it
Merge pull request #166 from iamtakashi/input-type-search

Change the search form text input to search type along with basic styling for search type inputs.
Merge pull request #66 from kovshenin/patch-8

Replace small-menu.js with navigation.js inspired by Twenty Twelve.
_s: Update layouts to use classes when appropriate. Fixes #55.
Merge branch 'master' of https://github.com/Automattic/_s.git