readme update
readme update

Talento/polymer-core-rails,vsimonian/polymer-iron-rails,Talento/polymer-core-rails,vsimonian/polymer-iron-rails,Talento/polymer-core-rails,Talento/polymer-core-rails,alchapone/polymer-core-rails,alchapone/polymer-core-rails,alchapone/polymer-core-rails,vsimonian/polymer-iron-rails