ClientScriptGlobal is a new Worldstate packet that handles short, long and float values for global variables in clientside scripts.
Previously, short values were handled by the ScriptGlobalShort packet, while a partially implemented ScriptGlobalFloat packet also existed, but both of those packets were Object packets because they were added near the end of 2016 when only Player and Object packets existed (with the latter actually being called WorldEvent packets at the time). Both ScriptGlobalShort and ScriptGlobalFloat have now been removed.
The serverside script functions previously used to interact with ScriptGlobalShort have, however, been kept so they can be adjusted to work with local variables in clientside scripts instead in a future commit.
Rename the old WorldKillCount that was a Player packet into PlayerPlaceholder. Rename the unused CellCreate that was a Worldstate packet into WorldKillCount. On the server, move kill count-related script functions from QuestFunctions to WorldstateFunctions.
For starters, the new packet can set which client scripts have all of their variables synchronized between players. The previous hardcoded list of IDs for synchronized scripts has been removed.
