backport some improvements from template-live-editor

Dependencies

• [2] QFFTXR7E new file-system format for freewheeling apps
• [3] TK4G4GMC expose a command for the driver to remotely restart an app
• [4] T3LA4DVG new command: batch GET
• [5] JUTECG5X bring template-live's protocol in sync with template-live-editor
• [6] TNRO6KLZ new live app
• [7] WIBNGKLF rename

Change contents

• replacement in main.lua at line 180
  [2.2387]→[3.401:448](∅→∅),[3.401]→[3.401:448](∅→∅)
  − app.send(app.get_binding(definition_name))
  [2.2387]

  [3.1]
  + local val, _ = app.get_binding(definition_name)

  + if val then

  + app.send(val)

  + else

  + app.send('ERROR no such value')

  + end
• replacement in main.lua at line 192
  [3.585]→[3.191:223](∅→∅),[3.191]→[3.191:223](∅→∅)
  − table.insert(result, val)
  [3.585]

  [3.223]
  + if val then

  + table.insert(result, val)

  + end
• replacement in main.lua at line 279
  [3.8026]→[3.8026:8065](∅→∅)
  − -- run failed -> false, error message
  [3.8026]

  [3.8065]
  + -- run (pcall) failed -> false, error message
• edit in main.lua at line 423
  [3.11721]

  [3.11721]
  + love.timer.sleep(0.001)