use of `time.After` is problematic

[flowchartsman]

https://github.com/papertrail/go-tail/blob/master/follower/follower.go#L220 will create a new *time.Timer for every iteration of the event loop, and this timer will not be cleaned up until its 10 seconds expire. For busy logs, this will be a problem and could explain #9.

Recommend using time.Newtimer and stopping and resetting it as appropriate