added signup controller support for buttons

Author: Sameer Dhar

app/templates/client/app/account(auth)/signup/signup.controller(coffee).coffee

@@ -22,4 +22,7 @@ angular.module('<%= scriptAppName %>').controller 'SignupCtrl', ($scope, Auth, $
         # Update validity of form fields that match the mongoose errors
         angular.forEach err.errors, (error, field) ->
           form[field].$setValidity 'mongoose', false
-          $scope.errors[field] = error.message
+          $scope.errors[field] = error.message
+
+  $scope.loginOauth = (provider) ->
+    $window.location.href = '/auth/' + provider

app/templates/client/app/account(auth)/signup/signup.controller(js).js

@@ -30,4 +30,8 @@ angular.module('<%= scriptAppName %>')
         });
       }
     };
-  });
+
+    $scope.loginOauth = function(provider) {
+      $window.location.href = '/auth/' + provider;
+    };
+  });