specify app in manifest

This will help the driver maintain separate settings for each app.

live.lua

@@ -138,6 +138,7 @@ function live.load_everything_in_manifest()
 end
 
 PARENT = 'fw_parent'
+APP = 'fw_app'
 
 function live.versioned_filename(index, root)
   return ('%04d-%s'):format(index, root)
@@ -215,6 +216,7 @@ function live.run(buf)
   if cmd == 'QUIT' then
     love.event.quit(1)
   elseif cmd == 'MANIFEST' then
+    Live.manifest[APP] = love.filesystem.getIdentity()  -- doesn't need to be persisted, but no harm if it does..
     live.send_to_driver(json.encode(Live.manifest))
   elseif cmd == 'DELETE' then
     local binding = buf:match('^%S+%s+(%S+)')