Update the footer for 2017 - yeahhhhhhhh

includes/_footer.slim

@@ -5,9 +5,10 @@ footer.page-footer
 
         h4 CocoaPods is a project from
         p.contributors
-          |  <a href="http://mariusrackwitz.de">Marius Rackwitz</a>,
+          |  <a href="https://twitter.com/benasher44">Ben Asher</a>,
+          |  <a href="https://twitter.com/dnkoutso">Dimitris Koutsogiorgas</a>,
+          |  <a href="http://dantoml.com">Danielle Tomlinson</a>,
           |  <a href="http://orta.io">Orta Therox</a>,
-          |  <a href="http://segiddins.me">Samuel Giddins</a>,
           |  and
           |  <a href="https://cocoapods.org/about#team">The CocoaPods Dev Team</a>
           |  with contributions from <a href="https://github.com/CocoaPods/Specs/graphs/contributors">many, many others</a>.
@@ -17,6 +18,7 @@ footer.page-footer
           | <a href="http://artsy.net">Artsy</a>,
           |  <a href="http://www.usebutton.com">Button</a>,
           |  <a href="http://www.capitalone.io">Capital One</a>,
+          |  <a href="https://circleci.com">CircleCI</a>,
           |  <a href="http://discontinuity.eu">Discontinuity</a>,
           |  <a href="http://www.fngtps.com">Fingertips</a>,
           |  <a href="https://www.heroku.com">Heroku</a>,
@@ -25,7 +27,8 @@ footer.page-footer
           |  <a href="https://www.sauspiel.de">Sauspiel</a>,
           |  <a href="https://www.slack.com">Slack</a>,
           |  <a href="https://www.soundcloud.com">SoundCloud</a>,
-          |  <a href="https://www.stripe.com">Stripe</a> and
+          |  <a href="https://www.stripe.com">Stripe</a>,
+          |  <a href="https://www.squareup.com">Square</a>, and 
           |  <a href="http://www.technologyastronauts.ch">Technology&nbsp;Astronauts</a>.
 
 footer.footer-links