Major change to the combat system

In the previous release, the combat system was built around each side having one monster, with changing type replacing changing monster. Well, now you can change monsters instead.

I might re-add changing type too for your starting monster.

If you are playing, right now you can get two more monsters for your team. You'll get one by going to the "city select" menu and one by entering Bellona City. You can only gain a new monster if you have an unused T-Gear for them to equip upon joining.