fixes pawn generation bugs with alien races
tweaks made to mana regeneration rates and calculations for paracyte thornbush
Mages and Paracyte can reduce the amount of mana regeneration available on a map if their combined count is greater than 50 - mages count as 2 points, each paracyte bush counts as 1 point.
Any points above 50 will reduce mana regeneration rate for mages by 0.42% per point