Lots of Timers created

[dustinconrad]

For every channel push a new timer (and thus a new thread) is created. This is quite expensive compared to using a ScheduledThreadPoolExecutor which would be re-using threads.

I plan on trying to convert all usages of Timers to using a shared ScheduledThreadPoolExecutor later in the week if this seems like a good change.

[dsrees]

Initial groundwork is in #42. Will continue to follow this pattern as I rework some of the classes

[dsrees]

Implemented in #43