TISTUD-4930 Alloy compiler does not support linked folders in workspace
Fix TISTUD-4084: no longer need to support Eclipse 3.6 API.
TISTUD-5870 npm packages are not shown in 'Run Diagnostic
Merge pull request #143 from pinnamur/TISTUD-4930

TISTUD-4930 Alloy compiler does not support linked folders in workspace
Fix NPE I saw in my dev environment