Include and style share buttons in two sizes for FB, Tw, G+.
Get accurate counts for test page URL for FB, Tw, G+
Get bad counts for follow/like for Tw, FB and accurate count for G+ plusones.
Use helper BrowserView for calls to Google+.
note the method does not use their API since it won't provide counts, but
just examines the values returned in XML using regex/xpath.

Fix a bunch of CSSLint and HTMLTidy issues.

Adds requests as a dependency.

More mobile styling and Response.js img sizes/inclusion.