Added some trait [Desc()]s.
Merge pull request #5946 from Phrohdoh/MoreTraitDocs

Added some trait [Desc()]s.
Style cop updates. Updates to LevelUp, Cloak, and UnitUpgrade to allow multiple units within range, plus maximum extra unit limit. (+1 squashed commits)

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[2103b01] Dupe crate action updates and fixes. (+2 squashed commit)

Squashed commit:

[0f4df4a] Added DuplicateUnitCrateAction.

[2787fa1] Clarity update. (+1 squashed commits)

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[93ddc3b] Crate updates.
+Multiple units per crate allowed.
+Allow time delay on crate actions.