Sometimes queue starts emptying after bot input

It seems as if tokens are not accumulating for some reason. Can't figure
out why. I don't think this will fix it, as Time.now < Time.now is true,
so our precision should be great enough to guarantee that once we wake
up from sleep, we need to add token + add new sleep.
Use float in Sleep instead of Integer

We may need to sleep less than 1s
Add queue plugin

Outputs how many slots left in queue.
Fastest rate IRCNet seems to accept