Propeller stores and reconstitutes tasks

.  Tasks can now be expanded with full functionality
.  Tasks are now only displayed if they are incomplete on startup
.  Completed tasks stay on the list until program is closed

.. User settings will need to be leveraged to determine completed task behavior
.. User sessions will need to be leveraged to calculate usage and productivity
.. Task creation will need to be changed from input to a full form

.. Menu will need to consist of settings and create task
.. Interaction and style have not yet been adjusted