Queue push/pop

[Tony Garnock-Jones]

(triggered by the changes to the process code to use push/pop instead of
addLast/removeFirst)

I don't like these names. Push and pop to me mean stack-like, LIFO
behaviour. Using them to mean FIFO behaviour seems weird.

(Might be interesting to consider adopting the Perl/Python/Javascript
idiom of push/pop, shift/unshift pairs? Hmm.)

Tony
-- 
 [][][] Tony Garnock-Jones     | Mob: +44 (0)7905 974 211
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