[2.3] [Console] TableHelper

When building a console application it may be useful to display tabular data.

`TableHelper` can display table header and rows, customizable alignment of columns, cell padding and colors.

Basic usage example:
```php
$table = $app->getHelperSet()->get('table');
$table
    ->setHeaders(array('ISBN', 'Title', 'Author'))
    ->setRows(array(
        array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
        array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
        array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
        array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
    ))
;
$table->render($output);
```
Output:
![table](https://f.cloud.github.com/assets/208957/14955/6fb4f500-46ca-11e2-8435-0f6b22f96e58.png)

If this PR gets merged I will submit doc PR as well.

I'm sure there is a plenty of room for improvements so any feedback is welcome.