Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never

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

Summary: verify the adr_type of a mach node was not changed
Reviewed-by: rasbold, never

Summary: Without LoopNode, exit early from loop unswitching and partial peeling
Reviewed-by: kvn, never, sgoldman