[MODCOMP] Stronger Natives 2016-10-05

This mod boosts the native civilizations in Colonization slightly:

Aztec: All units starts with Wilderness Warfare promotion:
- +20% Attack & Defense in Forest and Jungle, +10% in Light Forest.

Inca: All units start with Altitude Warfare promotion:
- +20% Attack & Defense on Hills and Peaks.

Tupi: All units start with Pillager promotion:
- +10% City Attack, +50% pillaged gold

Cherokee: All units start with Guerilla promotion:
- +30% withdrawal rate

Apache: All units start with Territorial promotion:
- +25% City Attack & Defense

Iroquois: Gains 5 guns per city, per turn.

Souix: Gains 5 horses per city, per turn.

Arawak: Gains +10% production for all crops, stronger relationships with other natives.