Setup redux

[winkerVSbecks]

• Switched to redux style directory structure
  • pages
  • components
  • renamed style ➡️ styles
• Configure store
• Added reducers for spots, nearbySpots and destination
• Removed a lot of state from spots-list component. We now pass in spots as an input.
• Subscribing to state in the HomeComponent and passing it down + triggering actions.
• modified no-unused-variable rule to ignore vars that end with a $ destination reducer

@christinakayastha I would recommend testing this branch locally before merging.