Reformat function headers - no code change.
Ignore IActiveScript::Close() failure - only happens if engine is already closed.
AXSH_CleanupEngineState: Ignore return code of IActiveScript::Close().
AXSH_CleanupEngineState() returns void now.
Add 2 TODO comments ("parse" command), remove an old one, change an error string.
Move engine cleanup to "DeleteProc" cleanup function of created engine command.