ADD support for text selection region and scope detection.

Signed-off-by: Richard Lea <chigix@zoho.com>
IMPROVE visibility detection for exception thrown.

Signed-off-by: Richard Lea <chigix@zoho.com>
ADD scope detection support for unsaved file.

Signed-off-by: Richard Lea <chigix@zoho.com>
UPDATE TO Version 3.0

Signed-off-by: Richard Lea <chigix@zoho.com>