Music master

The app was built while I was learning ReactJS and Redux

Concepts Learnt:

Learnt how to handle different states
Write Anonyomous arrow functions
Passing props from Parent components to child components
Conditional Rendering in React
ES6 Concepts like
- Initializing multiple variables from say, a json object: For example:
```
const index = json.index;
const preview_url = json.preview_url;
const name = json.name;
```
  Instead we can utilize ES6 feature as below:
```
const { index, preview_url, name } = json;
```
  Note that they must have same variable names as json objects
- Same can be done when setting states. For example:
```
let audio = new Audio(previewURL);
this.setState({
  playing: true,
  playingURL : previewURL,
  audio     /* Need not do audio : audio */
});
```
  If you have noticed, we do not need to explicitly set state for audio if they have same name.
- Parsing a URL(Variables should be enclosed in ${} and no need to use '+' to concatenate):
```
const BASE_URL = 'https://api.spotify.com/v1/search?'
let FETCH_URL = `${BASE_URL}q=${this.state.query}&type=artist&limit=1`;
```
  '?' is important at the end of BASE_URL
How to use react-bootstrap functionalities like FormControl,Button,InputGroup,FormGroup,Glyphicon
How to use a web API(Fetching the URL and parsing JSON file)
Handling promises returned from fetch function
map() method to iterate over an Array in React
CSS Styling
Include Audio and Animation features

Challenges

Add more features from the Spotify API. For example, showing featured-playlists that feature the searched artist.
Use the browse feature from the Spotify API to give recommendations to the user to search a trending artist.
Store the user’s searches in cookies to have the last search show upon revisiting the application (Hint: the next application uses cookies, so perhaps you can come back to this one).