Readme Documentation Updates

* [ ] **Actions**
    * [ ] What is an action?
    * [ ] How does someone make such a thing?
* [ ] **Events** (They need to be added first!)
    * [ ] What are these?
    * [ ] How are these distinguished between Action Results?
* [ ] **Battle Types**
    * [ ] Continuous vs Discrete
    * [ ] How does each battle type manage action management vs phase management?