Create An Autocomplete Example

[phidias51]

The demo page sets a property called "sources" but there's no documentation about what sources is supposed to be. Is it a Array<String>? Is it an Array<Object>? How is there a way to let the user lookup values, but store an associated key for the value? For example, if I want to use it to lookup a list user's name and the user object looks something like this {id:1234, firstName:'John', lastName: 'Smith'}, how would the user look this up? How would I get the ID of the selected user? Is there a way to create a custom paper-chip to handle selecting these kinds of objects? Since Polymer now supports ES6 classes, is there a way to have a User class with a toString method that returns the concatenated name that the autocomplete uses?