1.1.0

• Make toucan.db/insert! and friends use HoneySQL, so that you can use honeysql.core/call for SQL function calls. (Credit: @plexus)
• You can now pass protocol implementations directly to defmodel, the same way as you would with defrecord or deftype
  (#9) (Credit: @plexus)
• Toucan models now implement empty (#1) and apply (#2) (Credit: @plexus)
• Fix typo in error message (#8) (Credit: @bandresen)