Fixed a misformatted piece of docs
update copyright
Removed unnecessary intermediate array.  Microoptimized an extraneous check of $up.  Cleaned up some comments.
Re-ordered the checks in is_function_call() to put the fastest ones
first, and slowest ones last.  Inclusive time of 28000 calls to
is_function_call() in the nytprof run went from 15.8s to 12.3s
Removed RcsKeywords from the policies to profile because I bet a nickel nobody uses it.
Do the cheaper function first.