The change from Polymer 0.5 to 1.0 is a large one, as we transitioned from exploratory beta releases to a stable production-ready product.
So we wrote polyup to automate many of the steps
involved in upgrading. polyup will parse your HTML and
javascript and perform a number of transformations of your code to get
you started on the path to Polymer 1.0. For simpler projects,
polyup may even be all you need to do to upgrade.
Install it with npm install -g polyup
Check out the README on github for a complete list of current and planned transformations, or check out the live demo below.