Thank you all for suggestions and bug reports!
Improvements
Units can now walk through buildings to prevent blocking yourself in via clumps of buildings that must be placed together (guilds, houses, graves)
If religion is enabled, religion icons will be displayed next to each Lord's name on the political map
If religion is enabled, hovering over faith policies will display whether you will gain or lose influence with other lords based on their religion
Bugfixes
Cavalry units can now move through gatehouses
Player can no longer swap catapult and cavalry onto walls by having ground unit attempt swapping from the gatehouse
Sawm now correctly displays that no food and drinks are consumed
Salah and Tahrim al-Khamr now grant Morale and Resolve at the turn they are acquired and not on the following turn
Grave no longer requires you to have religion selected, so playing with religion disabled still allows you to gain faith and happiness
Skirmish maps now correctly end if you survive a certain amount of turns
Smuggling criminal ability now correctly gives you mentioned amount of Spears and Bows
Fixed missing texture bug for certain buildings on mission 4
Fixed some exploits in Mission 4
Fixed some typos