= can: support rendering 'Connection: Upgrade' in response header

according to http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.42
= project: upgrade to Scala 2.10.4
! http: remove obsolete `LinkDirective` model
= site: update footer and contact page
= site: Update site with version info re 1.3.1-20140423
Merge pull request #836 from cowboy129/master

= can: support rendering 'Connection: Upgrade' in response header