bump CocoaLumberjack

 Submodule changes to be committed:

 * CocoaLumberjack 45dcc59...c697669 (3):
   > Merge pull request #90 from diederich/fix/warning
   > Merge pull request #95 from cocoa-factory/master
   > Merge pull request #92 from mattjgalloway/FixFunctionNameOnCopy