Added figaro gem
added application.yml.example
added deprecation notice to credentials.example
added application.yml to gitignore
Changed one config setting (site name) over to figaro

Also massively simplified the original application.yml.example I
originally committed. Let's do this one step at a time.
Switched paypal settings to figaro
Moved mandrill config to figaro
moved mailchimp settings to figaro
moved flickr and twitter api config to figaro
Moved RAILS_SECRET_TOKEN to figaro

This is the last of the stuff that was in credentials.sh so I'm removing
the deprecated credentials.example at this point.
updated docs in application.yml.example
Need to put the site name in .travis.yml for tests to pass
oops, fixed incorrect syntax for env vars
Merge pull request #345 from Skud/figaro

Figaro