scottharwell/GoogleCharts — pull request #13 by PhantomWatson (2014-01-23 22:52:29+00:00)
Title: Add support for data formatters

Usage:
When defining a column, a NumberFormat pattern can be assigned to the 'format' key.

Example:
```
$this->chart->columns(array(
'category' => array(
'label' => 'Timespan',
'type' => 'string'
),
'value' => array(
'label' => 'Values,
'type' => 'number',
'format' => '0.00%'
)
);
```

This format will then be used in tooltips when the user hovers over the corresponding chart element.

Fixes scottharwell#12