[LUA] Missing features for the original campaign

[Spikeone]

This issue links all issues / features that need to be fixed for the original campaign

• [ ] #743 - AI aggression level
• [ ] #568 - Campaign Screen
• [x] #1175 - MET_LAND_SIZE
• [ ] #1176 - Change aggression level on attack
• [ ] #1178 - Keep forced buildings
• [ ] #1179 - Restrict buildinds in area
• [ ] #1181 - setPortrait

[Spikeone]

I've uploaded the updated (and original) map files and the lua scripts here: https://github.com/Spikeone/RttR_Campaigns