Modularize some elo constants.
Code cleanup and remove rarely-looked at leader info.
Remove unused variables.
Add code for initial rating placements for new players.
Disable database purging by default.
Fix up placement round rating changes.
Reintroduce leader/mvp star scoring simplified.
Increase placement match constant and setup for v1.0.0 updater release.
Remove sm_multi1v1_minrounds cvar.

Reason:
 - causes issues with multiple servers (one server might delete a new players' row)
 - unneccessary for a single server database

It'd be better for a web server to handle this sort of thing rather than a plugin thing.
Another tweak on placement constants.

The number of placement rounds should ideally fit into one map, imo.
Remove old debug stuff to prepare for 1.0.0 release.
End guns menu after x seconds and style fixes.
Change updater info to v0.4.0.
Make recording player connect times optional.
Add changelist for 0.4.0 release.
Change changelog to markdown.
Check if leader is valid before adding to their round score.
Add messages about being unranked to players.
Add message for players in the spectator queue.
Remove broken placement things.