In the project properties dialog, there is the ability to add source package folders. Unfortunately, for 
historical reasons, my java source package directory is in the main directory. 
In other words, autogen, build, dist, and com all exist at the same level. On a unix based system, I can 
create a src directory and make a symlink to the com directory, but for windows this doesn't work.

There should be a way to filter out directories from the source package folder which should not be 
included for source file lookup.

This appears to impact the performance of scanning classpaths for me, which renders Go To Source 
useless.