added death list and achievements list

Added death list and achievements list.
Sample TRPlayer->death() output:
```php
    [8] => Array
        (
            [date] => May 30 2014, 21:10:31 CEST
            [level] => 167
            [by_player] => 1
            [message] => Killed  at Level 167 by Duuker, Generallzs, Royal Tzu and Trevor Nakov.Assisted by Tzuu.
            [killed_by] => Array
                (
                    [killers] => Array
                        (
                            [1] => Trevor Nakov
                            [2] => Duuker
                            [3] => Generallzs
                            [4] => Royal Tzu
                        )

                    [assistents] => Array
                        (
                            [1] => Tzuu
                        )

                )

        )
```
Sample TRPlayer->achievements() output:
```php
Array
(
    [0] => Array
        (
            [achievement] => Ashes to Dust
            [stars] => 2
        )

    [1] => Array
        (
            [achievement] => High Inquisitor
            [stars] => 2
        )

    [2] => Array
        (
            [achievement] => Skin-Deep
            [stars] => 2
        )

)
```
Both functions were written using the (PSR-2)[https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md] coding style, but feel free to change it :)