Handle situation where there is a directory or Symbolic link which is a directory in the project source folder.

I have reviewed and tested the changes.

To be more concise:
Before Change: If the project folder had a symbolic link pointing to a directory, then the directory would not be indexed.
After Change: The directory to which the symbolic link is pointing to will be indexed.

This fixes Issue #469.

Please let me know if any other info is required for you to merge these changes.