TISTUD-5419 Improve detection of existing Node.js installs using registry on Windows
  - Verify that path registry points to exists, otherwise move on to searching PATH
Merge branch 'TISTUD-5419' of github.com:sgtcoolguy/studio3 into TISTUD-5419

Conflicts:
	plugins/com.aptana.js.core/src/com/aptana/js/internal/core/node/NodeJSService.java