[map] Pretty Patties

By sticking a crayon in the mix when making a burger you can now make a colored burger!

![untitled-24 copy](https://f.cloud.github.com/assets/4176358/2241774/5d401894-9ce3-11e3-8f31-d652a20a2af4.png)

Standardizes burger code to end the madness of there being like 30 different burgers that have the same damn thing in them.

Requires a map update because of the spellburger in the wizards den: path changes snacks/spellburger to snacks/burger/spell

Coded by request: http://www.ss13.eu/phpbb/viewtopic.php?f=5&t=3591