Don't flush network queue after every message.
Desingletonify CGameAttributes to allow testing.
Make network server/client basically testable.
Add very basic tests for network server/client.
Fix FsmActionCtx memory leak.
Split CNetHost into a separate file.
Convert CNetHost, CNetSession to a more conventional coding style.
Delete CNetLogger, since it's a lot of complexity and is barely used and
is redundant with CLogger.
Other minor simplifications.
This was SVN commit r7623.
