bail early on errors

Dependencies

• [2] 5TZBSRBN audit all calls to app.eval
• [3] ECUOUZI7 load manifest in correct order
• [*] TNRO6KLZ new live app

Change contents

• replacement in main.lua at line 106
  [2.118]→[2.118:135](∅→∅)
  − return err
  [2.118]

  [2.135]
  + error(err)