Updates authors and URLs
Revert "Add option to print out the most awesome ascii globe you've ever seen to work on my geography skills"

* This seemed like a good idea at the time, but I think our gem
  depending on chunky_png is not the best idea ever.

This reverts commit b876a8fef8d766011ade26e1c4c7d4aa6a64457a.
This reverts commit 57ef160673410e44bd45afe30b173e3877466ef0.
This reverts commit 95df46a78e8a0d33f5e89e47e2072371d5649140.
Bring development dependencies up to date
Use `ZONEBIE_TZ` over `TZ`

* `TZ` has a broader system use case and it was not appropriate for us
  to use it as an override to Zonebie

[Fixes #4] [Fixes #5]