add a model name formatter

lib/format.coffee

@@ -41,9 +41,17 @@ formatNumber = (number, places) ->
            i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + ',') +
            (if places then "." + Math.abs(number - i).toFixed(places).slice(2) else "")
 
+modelNames = (models) ->
+  names = model.get('name') for model in models
+  if names.length < 3
+    names.join(' and ')
+  else
+    "#{names[0...names.length-1].join(', ')}, and #{names[names.length-1]}"
+
 module.exports =
-  date:     date
-  dateTime: dateTime
-  boolean:  boolean
-  money:    money
-  number:   number
+  date:       date
+  dateTime:   dateTime
+  boolean:    boolean
+  money:      money
+  number:     number
+  modelNames: modelNames

quips.coffee

@@ -34,11 +34,12 @@ module.exports =
 
   # Formatters
   formatters:
-    date:     require('quips/lib/format').date
-    dateTime: require('quips/lib/format').dateTime
-    boolean:  require('quips/lib/format').boolean
-    money:    require('quips/lib/format').money
-    number:   require('quips/lib/format').number
+    date:       require('quips/lib/format').date
+    dateTime:   require('quips/lib/format').dateTime
+    boolean:    require('quips/lib/format').boolean
+    money:      require('quips/lib/format').money
+    number:     require('quips/lib/format').number
+    modelNames: require('quips/lib/format').modelNames
 
   # Test
   ChaiExtensions: require 'quips/test/lib/chai_extensions'