enables to install fonts via cookbook files

Adding font provider for installation of fonts via cookbook files.
Simply add the font into your cookbook files, depend on the windows cookbook and target the windows_font "your_font.ttf" within your recipe.

Chef 0.10.8 is almost three years old now, I think we can stop adding the `@action = :install` work-around to default_action now, which will make these files easier for new folks to read.

You could get rid of the `@file ||= @name` line as well by using :name_attribute, e.g.

```
attribute :file, :kind_of => String, :name_attribute => true
```