std.experimental.logger formal review round 3

[Robert burner Schadek via Digitalmars-d]

On Friday, 14 November 2014 at 23:06:22 UTC, Dicebot wrote:
> On Friday, 14 November 2014 at 22:20:17 UTC, Robert burner 
> Schadek wrote:
>> I will test something this weekend regarding the additional 
>> indirection.
>
> Thanks! I may try hacking some sample implementation too but 
> pessimistic about ETA

So, I added a layer of thread local indirection to the Logger. It 
now goes by default like:

log|trace|... -> threadLocalLogger -> globalLogger

The threadLocalLogger is just another Logger so it can be 
replaced with whatever you need may need. Or just keep it 
forwarding.