add Mini-Boss units and squad spawns

[rcorex]

This tweak adds mini-boss units and uses the new raptorcustomsquad parameter to add new spawn squads at various anger (evolution) levels:

35% to 69% - Apex Brawlers from 35%-69% anger
55% to 69% - Basic and Pyro Matronas, souped up matriachs that don't spawn units
60% onwards - Acid and Paralyzing Matronas
70% to 80% - Queenling Prima, mini-queen first stage
85% to 95% - Queenling Secunda, mini-queen second stage
85% onwards - Raptor Consort, a tanky brawler unit based on the Penguin King unit
95% to 125% - Queenling Tertia, mini-queen third stage

The gaps in Queenling spawn stages are meant to avoid overlap of having too many Queenlings at once.
Queenling Tertia typically stops spawning shortly before the Queens spawn at 1.3x queen spawn time multiplier.