Et Futurum Requiem

#Et Futurum Requiem 2.6.2: Shut up, update checker!

This hotfix release aims to fix an issue with the update checker claiming an update was available even after updating. I've went ahead and made a long-overdue migration to using MCLib's UpdateCheck library which puts a small update button on the title screen instead of putting any message in chat.

Fixes:

• Fixed walls not being in the right creative tab
• CI nightlies are once again recognized as snapshots internally.
• Fixes to the way version numbers are generated when building and how they're handled internally to hopefully make it less likely for update checker errors to happen again
• Fixed manasteel shovels from Botania, and Earthmover shovels from Thaumcraft being able to create dirt paths, which interfered with their special functions

Removals:

• Removed color-coded mod version and name