#Simple setInterval manager
Copyright 2012 Eugene Poltorakov (http://poltorakov.com)
Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php
##IntervalManager methods:
- IntervalManger.add(name, callback, delay, options, scope) - create timer instance
- IntervalManger.remove(name) - remove timer instance
- IntervalManger.get(name) - return timer instance by its name
- IntervalManger.getAll() - return objects with all existing timers
- IntervalManger.stopAll() - stops all unlocked timers
- IntervalManger.startAll() - starts all unlocked timers
##Instance methods:
- instance.start() - start instance
- instance.stop() - stop instance
- instance.lock() - lock instance (it's state couldn't be changed until unlock)
- instance.unlock() - unlock instance