fix typing on mobile
centers 'email has been sent' notification
updates humans on contact page to use npm-humans
updates maintainers class name on package page to humans
bumps npm-humans to ^2.0.1 to ensure we've got the latest :-)
fix header style regressions. again. shucks.
updates README and CONTRIBUTING
add stuff about assets, templates, styles, csp, locales, etc
moves google analytics id to match the old one (fixes #281)
Merge pull request #302 from npm/contact-humans

Contact humans
adapt package-widget to display packages with or without logos
bring in the comments from #268
the @ is dumb
fixes failing test
search headings should be ruled
shrink package logos a bit
upgrade to a case-insensitive version of `similarity`, so “ES6 Shim” is considered very similar to “es6-shim” cc @ljharb