Using the Font Picker

[w00fz]

Using the Font Picker tutorial pages/01.gantry5/04.tutorials/05.using-the-font-picker/docs.md could benefit from a new section that explains Local Fonts.

You can see how this works with any RT theme, including Hydrogen. It could also cross link to the other advanced section [http://rt.djamil.it/gantry-docs/gantry5/tutorials/fonts]

As a matter of fact, we might consolidate the Fonts tutorials into 1 section. Right now there are 3:

1. Adding a Custom Font
2. Using the Font Picker
3. Adding and Using Fonts