Add support for "Crimson Assault" Keystone

[majochem]

Fixes #991

Description of the problem being solved:

• Add support for "Crimson Assault" Keystone
  • "bleeding you inflict is aggravated"
  • "base bleeding duration is 1 second" (also supports ignite/poison variants)
• Removed a tiny piece of unnecessary code for the Blood Mage Blood Barbs mod parsing. It was using function(num) ... return { } end without actually parsing any variable from the string

Steps taken to verify a working solution:

• Bonus dmg from aggravate applies
• Bleed duration is correctly affected
• Works for Poison and Ignite
• Works for numbers both lower and higher than original base duration
• Doesn't crash for unknown ailments (it just won't parse)

After screenshot:

[LocalIdentity]

Fixed the mod to use a override so it works correctly with stack potential and the breakdowns look correct