Merge branch 'Balance' into 'master'

Ranged Weapon/Archer Balance

- Removed the free +20% attack speed on ranged weapons
- Swift Shot now grants an increased attack speed buff for 5 turns
- Removed armor penetration on Headshot
- Reduced damage dealt by Called Shots
- Reduced damage dealt and removed confusion on Shadow Shot
- Reduced damage dealt by Bullshot
- Trueshot now grants a scaling bonus to mark chance rather than a flat 100%
- Reduced number of talents placed on cooldown by Sentinel slightly
- Buffed Pestilent Blight
- Worm Rot now gains a scaling chance to trigger worm spawning on removal (including Catalepsy)
- Removed sustain cost of Shadow Decoy

See merge request !460