How to "Setup common, ref and sqlparser java projects"

[Ravisankar Sivasubramaniam]

Hello,
I am following this url for the project setup in eclipse.  After completing 
"clone the sources via git command line, and then File|Import... as "Existing 
Maven Project" by pointing to the pom.xml in the project root folder", how do I 
"Clone the souces to your local. Setup common, ref and sqlparser java 
projects"?  Can I do away with the second clone instruction?  Can you explain 
what setup here refers to?
And has it been decided not to checkin Eclipse files?  
Regards,Ravi