Sort matches in the order that they are played

Matches from worldcup.sfg.io are sorted by match number, which isn't too useful when the matches are not played in the order of their assigned match numbers. A more appropriate way of displaying the matches is in the order in which they are played.

Before:

``` bash
$ worldcup

Today’s matches:

USA                        0 - 0                   Portugal
-----------------------------------------------------------
⚽  Will be played Today at 7:00 PM

Belgium                    0 - 0                     Russia
-----------------------------------------------------------
⚽  Will be played Today at 1:00 PM

Korea Republic             0 - 0                    Algeria
-----------------------------------------------------------
⚽  Will be played Today at 4:00 PM
```

USA vs. Portugal is match number 30 but is actually played after matches 31 and 32.

After:

``` bash
$ worldcup

Today’s matches:

Belgium                    0 - 0                     Russia
-----------------------------------------------------------
⚽  Will be played Today at 1:00 PM

Korea Republic             0 - 0                    Algeria
-----------------------------------------------------------
⚽  Will be played Today at 4:00 PM

USA                        0 - 0                   Portugal
-----------------------------------------------------------
⚽  Will be played Today at 7:00 PM
```