Change the format syntax to foobar2000's title format
Change the format syntax to foobar2000's title format

Support for the previous format has been dropped. All custom
formats must be changed to the new one.
* Removed support for incomplete foo_controlserver settings.
* Implement several more functions.
* Removed the $bar() function, it basically didn't work.
  Will probably get a better implementation in the future.
* Implemented /foo_funcs, which lists the available functions.
* Actually validate arguments to functions,  previously only some checked.

Kovensky/foo_spam