CocoaLumberjack Subproject

[Tricertops]

I removed all CocoaLumberjack files directly included in repo in Vendor/CocoaLumberjack and added them as subrepository CocoaLumberjack to the same directory.

It now contains the latest changes including dispach_get_current_queue deprecation warning fix.

[lupinglade]

It would be nice to get rid of this dependency altogether IMHO, at least it should be optional.

[siuying]

It would be great to merge this in.

[vronin]

I updated CocoaLumberjack with the latest available code.

@iMartinKiss : I am not sure that we should switch to submodules. I agree it makes thing clearer, but it pushes some work from a maintainer to a person whole clone/pull repository. It will require to do two additional commands while clone "git submodule init" and "git submodule clone". Also, it requires to do "git pull --recurse-submodules" I believe it requires a little bit more thinking (especially, since Robbie kept it like that for quite long time).

@lupinglade: Please, can you write it as separate issue? Did you mean that NSLog should be used as default?

[lupinglade]

@vronin: Yes, exactly. Sure, I will create a new issue.