Show board

What I've done:

* Change initialize_the_board! method to set x_coord and y_coord (instead of x and y)
* Add games controller with the show method
* Load the game pieces into the controller
* Create show view and copy the show table
* In each cell check every piece if it has the appropriate coordinates and display its color and type 
* Change css style for black cells to white text color

How you can test it:

* run rails c in terminal
* run g = Game.create (creates new game go into your browser and check http://localhost:3030/games/1 - it should display an empty board) 
* run g.initialize_the_board! in the terminal 
* reload the page - it should display the pieces
* run g.pieces.last.update(:x_coord => 4, :y_coord => 3) and reload the page (you just moved a piece)

Questions:
Its a very expensive operation right now.. Any ideas how to do it less expensive?
Can you tighten this up a little?  Think about something like:
```
<% 0.upto(8) do |x| %>
<% 0.upto(8) do |y| %>
<td class="col-xs-1 space ....">
   ......
</td>
<% end %>
<% end %>
```

I bet we can get this to be around 1/3 the code size.

Also, what do you think about moving some of the logic into the game model?

`game.piece_in_position(x, y)` would make the view code cleaner