Add library for serializing items and inventories to the clusterio
module. This will provide a common codebase for plugins like
playerManager and trainTeleports to use in order to serialize
inventories to the master server.
Add startup event to the Clusterio module API which is raised at startup
of a Factorio server. This is to server as a replacement for the
on_init and on_configuration_changed events which cannot be used in
modules.
Adds clusterio_patch_number global from the patcher in order to
implement this. This is a number that's incremented every time the save
is patched.