std.experimental.logger formal review round 3

[Martin Nowak via Digitalmars-d]

On Tuesday, 28 October 2014 at 09:00:54 UTC, Robert burner 
Schadek wrote:
> The second two are wanted and disabling a LogLevel at CT of 
> phobos should be banned anyway. But no the less, it is one more 
> option the user has to manipulate the Logger.

And this is where the leakage happens because there is no sharp 
border between app and library. Functions of the library may get 
unlined into the app, templates of the library are instantiated 
in the app and some instantiations that are already in the lib 
won't be reinstantiated in the app.