Tic Tac Toe game from the React tutorial

https://facebook.github.io/react/tutorial/tutorial.html

Suggested improvements done (from React tutorial):

1. Display the move locations in the format “(1, 3)” in the move list.

• added clicked array to state - values set via handleClick(i)
• added locations array of values of move locations
• values in clicked array correspond to index of item in locations to determine move location

2. Bold the currently selected item in the move list.

• if move === this.state.stepNumber, set class of to 'active'.

3. Rewrite Board to use two loops to make the squares instead of hardcoding them.

• created 2 arrays - 1 for board rows and 1 for rendered squares
• used 2 for loops - first one to iterate three times to make the rows, and a for loop inside the first one to render squares
• created index variable for renderSquare function to take in as an argument to render each squares
• emptied rendered squares array after each row was made

4. Add a toggle button that lets you sort the moves in either ascending or descending order.

• added sortMovesAscending: true, to state
• added sortMoves function to set state after toggle button is pressed
• sort through moves using if statement

5. When someone wins, highlight the three squares that caused the win.

• added highlightWinners function to return array of winning square indexes
• stored array as a Board prop
• added square indexes as IDs on each button
• if ID = index of winning square, set class to highlighted

My own improvements added:

1. Added resetGame function to reset game

2. Added 'Tie' status if no one wins

3. Changed 'X' vs. 'O' to 'React' vs. 'Angular' images