Merge remote-tracking branch 'origin/master'

README.md

@@ -13,6 +13,10 @@ Run generate script:
 
     $ ./generate_doc.sh
 
+# Log
+We use ['Log'](https://github.com/delba/Log) for Logging. Log` is a powerful logging framework that provides built-in themes and formatters, and a nice API to define your owns.
+> Get the most out of `Log` by installing [`XcodeColors`](https://github.com/robbiehanson/XcodeColors) and [`KZLinkedConsole`](https://github.com/krzysztofzablocki/KZLinkedConsole)
+
 ## Contributing
 We'd love to see your ideas for improving this repo! The best way to contribute is by submitting a pull request. We'll do our best to respond to your patch as soon as possible. You can also submit a issue if you find bugs. :octocat: