fix(draw-route): clear old model data when creating new model

Fixes #57

app/scripts/controllers/create.coffee

@@ -42,6 +42,8 @@ angular.module('seaspongeApp')
             # Validate input
             # TODO
 
+            # Clear old model data
+            model.constructor()
             # Save input
             model.title = $scope.title
             model.authors = $scope.authors