Better Recognition for Class Method Names

[nickjs]

Previously, class methods (method names in a class prefixed with @) were not highlighted nor registered as functions definitions. This is my admittedly naive attempt at adding the @ symbol to the first character recognition of the function name regex. The achieved effect is that class-level function names are highlighted the same as all other functions (including the @ symbol), and they show up in the Go To Symbol navigator (also including the @).

A big win for anyone who has more than a handful of static methods.