Developer challenge completed and ready for reviewing.

Hi Jarl & Co,

Please look at my implementation of the developer challenge. Before
that, I have several notes:
- the JSON object contained not only Schalke's team actions, but I
considered the players as a single team;
- I was only testing the solution on Google Chrome browser, so I suggest
you also use it when testing. I think Safari browser also shows it fine;
- I have downloaded and used an awesome JS library Highcharts for making
a scatter plot of actions;
- I have borrowed a background picture from your Live Manager :)

If I were to continue implementing this solution, I would see the
following improvements first:
- picking series colors randomly or from a predefined array, where the
colors do not repeat. Currently there is the same color for two players;
- there is no information in the chart on what actions occurred, this
would be important to add;
- when clicking on the player name in the series takes a second or two
to hide all the other series. I was not sure why, it does not seem to be
computationally heavy;
- possible interactions between table and chart;
- design and user experience improvements.

I hope you enjoy my solution and I am very much looking forward to
hearing from you :)

Best regards,
Andrius Senulis