The first is Jumpboost (/jumpboost) This gives Neko's jumpboost 3 allowing them to jump up to 3 blocks.
The second is Swiftsneak. (/swiftsneak) This enchants the pair of Boost the Neko is wearing with the Swift Sneak 3 enchantment allowing them to sneak around better. The enchant is removed when the boots are removed.
Both of the new features are togglable through the config file which has been updated to 1.1 from 1.0 in this update.