Consolidate the two ibuffer erc groups into one
Turn on projectile only in `prog-mode' buffers
Diminish smart-tab-mode
Diminish magit-auto-revert-mode
Only display whitespace in prog-mode and text-mode
Update lispstick to work on non-Windows systems
Activate skeleton-pair insertion
Hook flyspell modes to prog and text modes

This will cover a lot more derived modes than the previous setup.