Load remix content in app when ?remix is present

1. Use old appmaker-remix-url to construct remix url for grabbing data published apps.
2. $.ajax to load data.
3. Some logic changes for user-state to react to ?remix url.
removed useless my.js code
hardcode /index.html onto remix loading url
now it works
Merge pull request #1 from Pomax/fortehbobbries

now it works
use encode/decodeURI to keep remix url simple
Merge pull request #809 from secretrobotron/load-remix-in-app

Load remix in app