module std.stream is deprecated - Will be removed by phobos version 2.070

[Vladimir Panteleev via Digitalmars-d]

https://github.com/D-Programming-Language/phobos/pull/3631

Apparently it was decided at DConf 2015 to remove std.stream and 
friends from Phobos. But these modules have been left untouched 
(i.e. they're "stable") for a long time, and there's a lot of D 
code using them. This decision seems to go in an opposite 
direction to other recent decisions (i.e. that we stop breaking 
code). Is everyone (incl. Walter AND Andrei) on board with this?