How to uninstall?

[jaraco]

The instructions provide details on how to install jekyll and github-pages. Those two commands installed a lot of things. Is it possible now to uninstall those packages and their dependencies now that I no longer need them?

It looks like I can uninstall the gems one by one, using the log of the gems it installed to determine which ones to uninstall, but this is tedious.

Perhaps the instructions should guide the user on how to create an isolated environment for this work, especially considering that many are likely to be unfamiliar with the Ruby ecosystem.

[Carreau]

See #152 also. instruction now use bundler which should wipe things out when you remove the directory as well (I think).