core: os logger api available has been added.
core: os logger api available has been added.

sushichop/CocoaLumberjack,jum/CocoaLumberjack,jum/CocoaLumberjack,jum/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,jum/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,sushichop/CocoaLumberjack,sushichop/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,sushichop/CocoaLumberjack