Cactus Code Thorn Timers
Author(s)    : Erik Schnetter <schnetter@gmail.com>
Maintainer(s): Erik Schnetter <schnetter@gmail.com>
Licence      : n/a
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1. Purpose

Provide various kinds of timers:

CactusTimer:    C++ wrapper around standard Cactus timers
CactusTimerSet: knows about all CactusTimers that were ever created
Timer:          hierarchical set of CactusTimers
TimerTree:      helper class for Timer