Simplify how functions are stored and passed. This is the first step in allowing us to sort functions so that dispatches are attempted in an organized order (as opposed to just the order they were added in).

Should have resulted in a speed imrovement too - fewer string copies during dispatch.

include/chaiscript/dispatchkit/proxy_functions.hpp

@@ -583,9 +583,9 @@ namespace chaiscript
     while (begin != end)
     {
       try {
-        if (begin->second->filter(plist))
+        if ((*begin)->filter(plist))
         {
-          return (*begin->second)(plist);
+          return (*(*begin))(plist);
         }
       } catch (const bad_boxed_cast &) {
         //parameter failed to cast, try again