Customers: Email Advanced Filter

Child task of #175 

![image](https://user-images.githubusercontent.com/22080/49667943-7b9bdb80-fa11-11e8-837a-53f8bbe0c859.png)

Create an Advanced Filter config and associated [autocompleter](https://github.com/woocommerce/wc-admin/tree/master/packages/components/src/search/autocompleters) for customer emails