Fixed Netspinner not having a proper icon.
Fixed empire's with the Ambusher civic from Hydra's More Civics not getting the Ambusher trait.
Added the Slippery trait.
Added the Lightweight Hull Specialist trait.

Reverted to 3 tiers for each trait.

Updated for 4.0.x

Fixed an issue with one of the new traits.
Added Ambusher and Weaver of Secrets to the pool of traits that can show up when Galactic Paragons is not enabled.

Added the Ruin Expert, Private Collector and Netspinner traits

Added tech requirements and DLC requirements to traits that needed them. No more ambushers without cloaking!