Summary: Renaming LoadC to LoadUS would round up the planned introduction of LoadUB and LoadUI.
Reviewed-by: phh, kvn

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Summary: T_ADDRESS size is defined as 'int' size (4 bytes) but C2 use it for raw pointers and as memory type for StoreP and LoadP nodes.
Reviewed-by: jrose