Backporting signal handling while "sleeping" from #352
Preparing for 2.5.3 release
Adjusting some documentation around rake task, cli, env vars

[ci skip]
Bumping to v2.5.4 as we've hit the milestone
TRIVIAL: updating commented-out every example

Closes #186
TRIVIAL: un-derping my derp about every

Closes #186 for realsies :smiley_cat:

[ci skip]
Updating HISTORY for 2.5.4