Upgrade 'Creep' Skill

[nevir]

@Tagris

However, the creep skill only prevents you falling if:

The block is a regular un-chiseled block and the direction you are creeping cannot have another regular un-chiseled block or chiseled block.

This is a bug, thankfully - not sure when it will be fixed, but I can’t wait

@james

Known Issues:

The following items are known issues in this release.
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• Creeping on top of chiselled blocks does not prevent characters from falling off.

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