refactor

[jonathanong]

• separate utilities to separate files
  • should be fine to use if we do a UMD build
• remove on body ready logic
  • this should be handled by the application
  • unnecessary if we load the script tags in the body
  • alternatively, we can just add classes to the html element
• remove response
• remove stores, default to memory
  • easier to test when we don't have to deal with localStorage
  • NOTE: NO DEFAULT
• tests – run on JSDOM so it's easier
• consider removing bower and only support npm