Factorize favicon extraction to a new tag: #{favicon strUrl /}
Switch from getfavicon.appspot.com (currently down) to google.com/s2 to grab favicons.

Fix mix-it/linkit#316
Add Cloud Foundry manifest + README update
Deploy to CloudFoundry, with specific configuration isolated with "%cloudfoundry.".

Based on mix-it/linkit#318 by @sdeleuze.
README: add note about CloudFoundry's spaces
Merge pull request #317 from clacote/fix/316-getfavicon-alternative-while-down

getfavicon down: switch to google.com/s2
Merge pull request #319 from clacote/cloudfoundry-specific-configuration

Cloudfoundry specific configuration