PHP's number_format like template filter
This filter allows you to format numbers like PHP's [number_format](http://php.net/number_format) function. If `var` equals 1234.567`{{ var|number_format:2 }}` produces 1,234.56. Because Django's template filters support just 1 argument you'll have to adjust the argument's default values by hand until [#1199](http://code.djangoproject.com/ticket/1199) is fixed.
- filter
- number_format