draft proposal for ref counting in D

[Walter Bright]

Rainer Schuetze wrote:

On 25.06.2013 23:00, Walter Bright wrote:
 > 4. Null checks are done before calling any AddRef() or Release().

Here is another nitpick that needs to be addressed: As mentioned in the 
implementation of ComObject invariants (and out contracts) must not be called 
when returning from Release, if it is ok to actually delete the object.