Compound assignment for arrays is working, untested, read more

I added reference values in 62ca7a1fb7,
but forgot to mention it. I'm now using references to assign to the
internals of an array, no matter how many levels deep it is.

source/toy_array.h

@@ -41,4 +41,5 @@ TOY_API Toy_Array* Toy_resizeArray(Toy_Array* array, unsigned int capacity);
 #define TOY_ARRAY_PUSHBACK(array, value) (TOY_ARRAY_EXPAND(array),(array)->data[(array)->count++] = (value))
 #endif
 
-//URGENT: check array length from scripts
+//URGENT: get array length in scripts (dot operator?)
+//URGENT: array as a type