Add lots of documentation.
Add lots of documentation.

Patch by: David James <james82@gmail.com>
          me

* tools/examples/svnlook.rb: Add documentation.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@855143 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion