change mixins

[sybrandy]

On 02/15/2010 01:50 PM, BCS wrote:
> Hello sybrandy,
>
> [...]
>> Did I make that clear enough?
>
>
> OK I see what you are doing, but now I don't see why you are using
> mixins at all. (Unless you are doing the pass-expressions-as-strings
> trick but just didn't show that. As for that case, I've already pointed
> out why I think mixins at all is the wrong way to go.)
>
In short: I'm using mixins so that the person who's using the library 
doesn't have to put in version(DoLogging)... all over the place.  By 
containing it in one location, I was trying to keep the code using the 
library cleaner.