UI is now acceptable
Added Jgoodies common library
Text in TaskInputPanel disappears and reappears now on focus change.

If the textfield gets focus and contains the default text, the text gets
erased.
If the textfield loses focus and is empty, the default text reappears.
CLIReminder sends out a task update on every commit
CLIReminder.getNextTaskID() gives next id correctly
Tasks in the GUI feature are represented through a Panel now.

Added functionality for deleting tasks over the interface.