Recursively delete .svn directories
Subversion is a software versioning and revision control system.
Every copy of source code received from subversion repository has .svn folders, which store metadata.
This is a simple example of a unix command, which recursively deletes subversion .svn folders, these folders are often not necessary, if you want to distribute the source code.
You can put this code at the end of your .bashrc file, in order to make it like a system command, please do not remove the other lines in the file.