Add namespace for project-specific channel transformers.
Remove functions I don't understand from lib/async.

I freely admit that I don't totally get the concepts behind David
Nolen's throttle/debounce transformers, so I would prefer not to even
use them. This is a learning experience, after all.
Split character select view and helpers into its own file.
Split life counter view and helpers into its own file.
Bump Om to 0.6.5.
Place tagged pairs in output chan of running-total.

Instead of just emitting numbers, running-total will now emit pairs in
the form `[:running-total 10]` or, after the timeout, `[:total 15]`.
Feed hit button clicks into combo channel.

Combo channel output is just logged to the console right now, but it
looks right!