[phobos] Please stop merging pull requests

[Walter Bright]

unless they are fixing regressions in the beta.

The last time I did a pull to add in the changes to std.parallelism, it pulled 
in a bunch of other stuff that broke peoples' code in the beta. We will never 
get the release done by doing things this way.

The current beta breaks are:

http://d.puremagic.com/issues/show_bug.cgi?id=6606

and Sönke Ludwig's problem with DLLs that probably resulted from a change in 
druntime.

Please, no more merging other than fixing these two issues.