Features implemented as below:

- Slackbot Greeting: thoughtful reminder for user to play music within slack

- Search & Play: text search by [artists, albums, tracks] results with spotify within slack and show top 5 results and select & play

- Handle error with server - respond if the song couldn’t be accessed or played

- Handle mis-understanding - respond if the bot doesn’t understand what’s being asked

- Help - provide some help information to a user if they need guidance