TDPL goes out for preliminary review

[dsimcha]

== Quote from Andrei Alexandrescu (SeeWebsiteForEmail at erdani.org)'s article
> But let's not forget we have concurrency ahead of us. I encourage you
> all to chime in with your thoughts and ideas regarding all aspects of
> concurrency. The recent multicore performance bug is a great starting
> point. If you try e.g. shared and it's broken, let us know. If you try
> it and it works, push it til it breaks. If you have ideas on how to make
> semantic checking better, pipe up.
> Andrei

I think for this to happen, there needs to be a tutorial somewhere explaining what
shared is supposed to do (there were so many ideas thrown around that I don't
remember them all and don't know which ones got adopted), and how much of it is
already implemented.