Remove FishyUpdater from the README

Show errors provided by the serverlist

Remove updater submodule

Remove submodule option in poggit.yml

Ignore config file

Fix an annoying issue caused by the update checker

Predefine $err for Utils::getURL()

Move to wiki, cleanup readme.

Bump version to 2.1.0

I mainly did this to trigger a build for poggit, but I also can't see
this 14 anymore.

Use the new way to get errors from Utils::getURL()