[Newcompiler] tagging methods?

[Marcus Denker]

> Solution:
> We tag a method as compiled with the new compiler via a method
> property. We can do the same for #compileBlocks as closures.
>

Yes, we should do that.

> I thought about this {old compiler. new compiler}x{old decompiler.  
> new decompiler} when starting to help with new decompiler.
>
> An alternative would be an "options" bit field in the  
> MethodProperties, which would extend CompiledMethod>>#header by 31  
> bits (and so avoids a new, fat Dictionary instance per new  
> CompiledMethod).
>

I like that solution, yes. The only problem might be that we can't  
easily add a field using monticello... which would mean to load a .cs  
before loading
the newcompiler package... or can we solve it differently? Maybe it  
could be creaded lazily...

> I'm confident that the remaining 30 option bits will soon find some  
> other friends :)
I'm sure...

	Marcus