Memory Management in D: Request for Comment

[dsimcha]

== Quote from Jason House (jason.james.house at gmail.com)'s article
> Please add weak references! I can email you a druntime compatible implementation.

Probably be better to submit it as a patch to Bugzilla if it's reasonably
well-tested and working already.  On the other hand, I am curious to see how this
was done.  Did it involve hacking gcx.d or was there a more graceful way?