1. Manage state with @ngrx/store

[BioPhoton]

Below you have a check list to follow.
A detailed step by step description on how to solve the exercise is in the wiki.

• [ ] Preconditions Install @ngrx/store module over npm npm install --save @ngrx/store
• [ ] Implement the store
  • [ ] Setup StoreModule and IDB interface in app module
  • [ ] Setup actions to change the stores state
  • [ ] Setup reducer
  • [ ] Register the reducer
  • [ ] Subscribe to changes and dispatch actions
• [ ] BONUS Refactor to selector functions
  • [ ] Create selector function in flight.reducer.ts
  • [ ] Use selector function in flight.service.ts
• [ ] BONUS Implement state for flightPending State
  • [ ] Extend actions
  • [ ] Extend reducer
  • [ ] subscribe to changes and dispatch actions