- Added "Cancel" button funcitonality to all tabs
- Removed "exit" from the gui on some error conditions
- Added code for sequential output in textEdit window for all tabs
- Added an incremental periodic message when a large task is running.
  This is not tested well, but is checked in for feedback.
Merge pull request #43 from sunithamisra/master

- Added "Cancel" button funcitonality to all tabs