Added option to start the campaign with every agent.

Moved changes to how skill upgrades are handled from Agent Reserve to Sim Constructor, since they may be useful to other mods.

Fixed skill upgrades that are not yet locked in being transferred between agents when their order is changed.

Fixed crash when using Lone Start.

Fixed error when using lone start and mission 1 upgrading.
In the Omni Foundry agents can now spawn in the entire starting room, not just in the elevator.
Added disclaimer for large team sizes.
Fixed story agents in the final mission not spawning when they should in the case of a large team size.