Sctructuring store, actions and reducers

``` javascript
var people = [add, remove];
var aliens = [add, remove];

var addPerson = function (name, age) {
  return {
    type: 'people:add',
    name: name,
    age: age
  };
};

var app = function (state, action) {
  var reducer = action.type.split(':').shift();
  reducer(state, action.type.split(':').pop());
}
```
