Show url to Class#none and Module#none

**Problem**
Flog shows file location and line number only for methods. If code is directly inside of class or module (i.e. Rails validations) then it's marked as `ClassName#none` and no file or line is specified.

**Steps to reproduce**
Use flog on any Rails project or class with `include` directive.

**Solution**
Detect classes that are declared first time and show file and line number of declaration. This patch is doing so.