[phobos] std.log ready for review!

[Jose Armando Garcia]

Hey all,

The module std.log is finally ready for review. I would like to put it
in the review queue for phobos. Here are some links for your
documentation:

1. HTML Documentation: http://jsancio.github.com/phobos/phobos/std_log.html
2. Source code: https://github.com/jsancio/phobos/blob/log/std/log.d

The module should work as is with the latest druntime. I would really
appreciate it if you can try it and comment on the implementation.

Thanks,
-Jose
PS. It has been a while since I tested it in Windows but it should
work. I am going to spend some time validating that OS.