svnX make sure the svn binary is present in the folder

How to fix the svnx Error: Error:Unable to locate svn binary

Svnx just the UI features based on the svn binary.  To make SVNX work, you need let it know where the svn binary is.  If you meet this error, it will popup a dialog for you to check the preference, click the preference button, you can fill in below svn location in your xcode application: 

/Applications/Xcode.app/Contents/Developer/usr/bin/

Then you SVNX will work.  I fixed this issue just now.  So make a note here for others reference.